My first car was a Mazda RX-2. It was overdesigned in every way -- which was probably an apology-in-advance for the fact that it never got more than 19.6mpg (though interestingly, seldom less).
One of its features was a 4-barrel Holley carburetor. Four barrels for two rotors is ... well, go figure. Anyway, I had discovered that right around 60mph, I could make the car backfire. This was achieved by accelerating and decelerating right at the point that doing so caused the secondary throttles to open and shut. Opening and closing the secondary throttles would send a pulse of rich exhaust down the pipe. When that hit the open air at the other end, Blammo! It is possible that I could have achieved the same effect using the manual choke (yes, it had one), but I already had one method, and that was good enough.
So there I was. On one of my samurai driving stints between my apartment in Boulder CO and my parent's house in Greensboro NC, I happened to be driving through downtown Knoxville just at dusk in the middle of rush hour. And there had to be some guy in a big hurry, filling up my rear-view mirror with his Cadillac -- as if that would somehow make the people going 60 in front of me move faster. So I let him have it.
I did the trick with the gas pedal, and a great big, blue ball of flame rolled out of my tailpipe. (I saw the reflection in his grille.) It was magical! Thy guy in the Caddy slowed way down, and I traversed the rest of Knoxville, still at 60, but with plenty of space behind me.
Wednesday, June 28, 2017
Thursday, August 27, 2015
Dirty Trick #12 -- Speech Synthesis
Shortly after I started working for the Office of Telecommunications, my manager set up a demo that involved a minicomputer linked to a Votrax voice synthesizer. He had programmed it to say, "Hello! This is the computer talking ... ."
The temptation was too great. After he had left for the day, I studied the phoneme vocabulary for the Votrax, and replaced his program with one that started out: "Howdy, y'all!"
Dave was not too happy when I showed up the next day, and only slightly mollified when I showed him the backup copy I had made of his program. Practical jokes need to be carefully calibrated, I guess.
The temptation was too great. After he had left for the day, I studied the phoneme vocabulary for the Votrax, and replaced his program with one that started out: "Howdy, y'all!"
Dave was not too happy when I showed up the next day, and only slightly mollified when I showed him the backup copy I had made of his program. Practical jokes need to be carefully calibrated, I guess.
Wednesday, May 27, 2015
Dirty Trick #11 -- Master Key
The combination locks that were checked out to students in my junior high and high school were outfitted with a cylinder that would accept a master key. This was undoubtedly a great convenience for the custodian, in case access had to be gained without the student's participation. It immediately occurred to me that I would have great power over my fellow students if I possessed a copy of that master key.
I had no thought of "borrowing" the master key from the custodian, but I did consider making one. Before I started high school, somehow one of the high school locks was added to my collection. I used an assortment of my father's tools to destroy enough of the lock to remove the cylinder. And during the same time, I obtained a blank of the right dimensions from the local K-Mart. It only remained to measure the tumblers and shape the key so that it moved the tumblers into the right alignment..
That is where I lost confidence. I had only one blank, so I didn't dare make an error. I had the cylinder out of the lock, but I didn't want to take the tumblers out of the cylinder, for fear that I would not be able to reassemble the precious cylinder and test my creation. If I had had 10 blanks and 2 cylinders, the outcome might have been different. As it was, I abandoned the project after taking one small nick out of the blank with a file.
No matter. It turned out that the idea of a master key was just as good as the real article.
The spring of my sophomore year, I was standing near Kathy Humphries' locker and chatting with her before fourth period. One of a group of bullies standing nearby reached into Kathy's locker, took out a package of Twinkies, put it in his own locker and slammed the door before we could protest. We both demanded the Twinkies back, but the boys laughed and went off to class.
I vowed revenge. I had noticed that the boy had a baseball glove in his locker, and I imagined there were other valuable items in there as well. I returned before 7th period and tried to get the baseball glove in order to force a swap. But the bully saw me coming and guessed my intent. The locker door was closed before I could reach inside.
It happened that that day was a Friday. I returned to the school on the next day and used my usual trick to pop the latch on the cafeteria doors at the west side of the building. Soon enough I gained access to the math wing, and went to the right locker. With a swift kick, my hiking boot knocked the entire handle off the front of the locker.
I had observed another locker whose handle had been broken off by accident, so I assumed it would be easy enough to repair. I examined the locker handle, and found that it had been held in place by two small machine screws. My blow had caused both to shear off near the head, but neither the locker nor the handle was damaged. All I needed was two replacement screws, and the locker would be good as new. I backed out the shafts of the headless screws and picked up the heads. I put all these in my pocket for later comparison.
It was then easy enough to help myself to the locker's contents. But I didn't want to be found with stolen property in my locker. That would never do. I needed a safe place to store the loot that was not incriminating. I immediately got the idea of putting the stuff in the lost-and-found. I took the glove and a cap and a few smaller items, and went down to the principal's office. I used my latch pick to open up the main door and then went into the closet that held the lost and found. I burrowed down in the pile of forgotten clothing and nested the goods near the bottom of the cardboard box.
Then I went down to McGuckin's Hardware, and found a match for the broken screws in thread size and length. I even had the good fortune to find ones with hexagonal heads, just like the ones I'd broken. I went back to the high school, repaired the locker handle and left. So far, so good.
---***--- ---***--- ---***--- ---***--- ---***--- ---***--- ---***--- ---***---
On Monday, I was met at my locker by a very angry bully-boy. Angry, but respectful, lest he should make me decide to return his property never. He demanded to know if I was responsible for the disappearance of his baseball glove, and wanted to know how I had done it. I told him I had made a master key that fit all the locks in the building, and he wasn't going to get his glove back until he returned the Twinkies. He said he didn't have the Twinkies any more (presumably having eaten them). Too bad. (Conversations were short, because the halls cleared out in a hurry when the second bell rang.)
A short time later, I received a note that summoned me to Millie Beavers' office the following period. Millie was the head of the math department, and also was responsible for managing the lockers in the math wing. When I showed up in her office, she put out her hand and said, "Okay, where is it?" (I was taking independent study math which she supervised, and her tone was normally much more cordial.) I was forced to explain that there wasn't any master key, and how I had obtained access to the locker by breaking off its handle. When asked about the loot, I said I didn't really take it -- I had just put it in the lost-and-found.
That was the end of it: I received no punishment; the boy reclaimed his stuff, and Kathy never did get her Twinkies back. In retrospect, I suppose Millie was smart enough to let the master key story stand. Revealing that a locker handle could be sent flying by a sincere glancing blow would have precipitated general mayhem. So that was our little secret.
From the bullies' perspective, however, the idea that I had made one master key certainly meant that I could make another. Bully-boy and his chums treated me and Kathy with proper respect for the rest of our time at Boulder High.
I had no thought of "borrowing" the master key from the custodian, but I did consider making one. Before I started high school, somehow one of the high school locks was added to my collection. I used an assortment of my father's tools to destroy enough of the lock to remove the cylinder. And during the same time, I obtained a blank of the right dimensions from the local K-Mart. It only remained to measure the tumblers and shape the key so that it moved the tumblers into the right alignment..
That is where I lost confidence. I had only one blank, so I didn't dare make an error. I had the cylinder out of the lock, but I didn't want to take the tumblers out of the cylinder, for fear that I would not be able to reassemble the precious cylinder and test my creation. If I had had 10 blanks and 2 cylinders, the outcome might have been different. As it was, I abandoned the project after taking one small nick out of the blank with a file.
No matter. It turned out that the idea of a master key was just as good as the real article.
The spring of my sophomore year, I was standing near Kathy Humphries' locker and chatting with her before fourth period. One of a group of bullies standing nearby reached into Kathy's locker, took out a package of Twinkies, put it in his own locker and slammed the door before we could protest. We both demanded the Twinkies back, but the boys laughed and went off to class.
I vowed revenge. I had noticed that the boy had a baseball glove in his locker, and I imagined there were other valuable items in there as well. I returned before 7th period and tried to get the baseball glove in order to force a swap. But the bully saw me coming and guessed my intent. The locker door was closed before I could reach inside.
It happened that that day was a Friday. I returned to the school on the next day and used my usual trick to pop the latch on the cafeteria doors at the west side of the building. Soon enough I gained access to the math wing, and went to the right locker. With a swift kick, my hiking boot knocked the entire handle off the front of the locker.
I had observed another locker whose handle had been broken off by accident, so I assumed it would be easy enough to repair. I examined the locker handle, and found that it had been held in place by two small machine screws. My blow had caused both to shear off near the head, but neither the locker nor the handle was damaged. All I needed was two replacement screws, and the locker would be good as new. I backed out the shafts of the headless screws and picked up the heads. I put all these in my pocket for later comparison.
It was then easy enough to help myself to the locker's contents. But I didn't want to be found with stolen property in my locker. That would never do. I needed a safe place to store the loot that was not incriminating. I immediately got the idea of putting the stuff in the lost-and-found. I took the glove and a cap and a few smaller items, and went down to the principal's office. I used my latch pick to open up the main door and then went into the closet that held the lost and found. I burrowed down in the pile of forgotten clothing and nested the goods near the bottom of the cardboard box.
Then I went down to McGuckin's Hardware, and found a match for the broken screws in thread size and length. I even had the good fortune to find ones with hexagonal heads, just like the ones I'd broken. I went back to the high school, repaired the locker handle and left. So far, so good.
---***--- ---***--- ---***--- ---***--- ---***--- ---***--- ---***--- ---***---
On Monday, I was met at my locker by a very angry bully-boy. Angry, but respectful, lest he should make me decide to return his property never. He demanded to know if I was responsible for the disappearance of his baseball glove, and wanted to know how I had done it. I told him I had made a master key that fit all the locks in the building, and he wasn't going to get his glove back until he returned the Twinkies. He said he didn't have the Twinkies any more (presumably having eaten them). Too bad. (Conversations were short, because the halls cleared out in a hurry when the second bell rang.)
A short time later, I received a note that summoned me to Millie Beavers' office the following period. Millie was the head of the math department, and also was responsible for managing the lockers in the math wing. When I showed up in her office, she put out her hand and said, "Okay, where is it?" (I was taking independent study math which she supervised, and her tone was normally much more cordial.) I was forced to explain that there wasn't any master key, and how I had obtained access to the locker by breaking off its handle. When asked about the loot, I said I didn't really take it -- I had just put it in the lost-and-found.
That was the end of it: I received no punishment; the boy reclaimed his stuff, and Kathy never did get her Twinkies back. In retrospect, I suppose Millie was smart enough to let the master key story stand. Revealing that a locker handle could be sent flying by a sincere glancing blow would have precipitated general mayhem. So that was our little secret.
From the bullies' perspective, however, the idea that I had made one master key certainly meant that I could make another. Bully-boy and his chums treated me and Kathy with proper respect for the rest of our time at Boulder High.
Monday, September 1, 2014
Dirty Trick #10 -- Applied Physics
By the time I was in high school, I was already a feminist. My mom -- being then the president of the Boulder chapter of NOW -- had made sure of that. But she had also moved beyond believing (as some feminists did) that common courtesies -- such as holding doors and allowing ladies to enter first -- were symbols of sexism. Rather, she treated them as a mark of respect that was her due.
Two of the young ladies in my physics class, Kathy and Alison, had decided at this time that they were feminists, but they were still on the previous page. I would often arrive at the dual doors to the math/science wing a few moments ahead of them, and began holding the door open for them. Whereupon, they would make an elaborate show of opening the other door for themselves and passing through.
After the second or third occurrence, I decided to take advantage of their predictability -- and I knew just how to do it: Some time before, I had noticed that the left-hand door was hard to open, and took a long time to close. An examination of the door-closer mechanism revealed a set screw. Using my pocket knife, I loosened the set screw and tried the door. It opened easily, and closed more rapidly. "Ah, hah!" I said to myself, "this must be an air bleed, intended to control the speed at which the door closes." But it could also make the door hard to open. [cue ominous music] I had thought that door-closers contained a one-way valve that would always allow the door to open easily: the air bleed would only control the speed at which the door closed. But this one either lacked such a valve, or that valve had long since failed closed.
The next day, I made an extra effort to arrive early, took out my pocket knife and twisted the air-bleed screw on the left-hand door-closer firmly into its seat. No air bleed. I tried the door and it swung open a few inches. It would have taken a team of oxen to open it any wider. Perfect. People were starting to arrive, so I held the right-hand door open for them. Those exiting the wing were obliged to duck around the mullion.
Right on cue, Kathy arrived. Following the standard script, she went over to the left hand side and tried the door. No dice. She gave me a look that would melt steel as she swept through the right-hand door. Mission accomplished. I put the set screw back to its previous position, and joined the physics class. Kathy avoided the left-hand door for weeks....
Two of the young ladies in my physics class, Kathy and Alison, had decided at this time that they were feminists, but they were still on the previous page. I would often arrive at the dual doors to the math/science wing a few moments ahead of them, and began holding the door open for them. Whereupon, they would make an elaborate show of opening the other door for themselves and passing through.
After the second or third occurrence, I decided to take advantage of their predictability -- and I knew just how to do it: Some time before, I had noticed that the left-hand door was hard to open, and took a long time to close. An examination of the door-closer mechanism revealed a set screw. Using my pocket knife, I loosened the set screw and tried the door. It opened easily, and closed more rapidly. "Ah, hah!" I said to myself, "this must be an air bleed, intended to control the speed at which the door closes." But it could also make the door hard to open. [cue ominous music] I had thought that door-closers contained a one-way valve that would always allow the door to open easily: the air bleed would only control the speed at which the door closed. But this one either lacked such a valve, or that valve had long since failed closed.
The next day, I made an extra effort to arrive early, took out my pocket knife and twisted the air-bleed screw on the left-hand door-closer firmly into its seat. No air bleed. I tried the door and it swung open a few inches. It would have taken a team of oxen to open it any wider. Perfect. People were starting to arrive, so I held the right-hand door open for them. Those exiting the wing were obliged to duck around the mullion.
Right on cue, Kathy arrived. Following the standard script, she went over to the left hand side and tried the door. No dice. She gave me a look that would melt steel as she swept through the right-hand door. Mission accomplished. I put the set screw back to its previous position, and joined the physics class. Kathy avoided the left-hand door for weeks....
Sunday, March 16, 2014
Dirty Trick #9 -- Office Space
One year on the 31st of March, I took care to put a 6mm hex wrench in my pocket before setting out for work. After most people had gone home for the day, I went to the multi-purpose room and helped myself to a spare piece of cubicle wall. I carried it up to my boss's cube and installed it in place of the gap that formed the entrance.
The next morning, Mikel strode down the hall, cut a quick dogleg to the left and ran smack into the newly-installed barrier. I wasn't there to witness it, but he related the story to me later with a chuckle.
The next morning, Mikel strode down the hall, cut a quick dogleg to the left and ran smack into the newly-installed barrier. I wasn't there to witness it, but he related the story to me later with a chuckle.
Thursday, May 23, 2013
Dirty Trick #8 -- Remote Control
In junior high, I was already doing my own bike maintenance. From time to time, it became necessary to transport a disabled bike down to The Spoke in the Table Mesa Shopping Center. What better way to do so than to push the stricken bike while riding on another one? A bit of experimentation revealed that grasping the second bike across the handlebar stem afforded me complete control over where that bike was headed.
My new skill came in handy a short time later. There was a bully that went to the same junior high, and rode his bike to and from school along the same route through the Bureau of Standards. It was not a through street for cars, and crossed some undeveloped grassland for about an eighth of a mile. Away from observing motorists and residents, he felt like he could get away with anything -- such as shoving me off the roadway or trying to put sticks in my spokes.
The day he came up and prepared to force me off the road, I simply reached across and placed my right hand on his handlebar stem. It didn't take him long to realize that the situation had changed completely. His nasty/smug look disappeared almost instantly. After I plotted a new course for him that veered gently away (well, maybe there was a rock or two on the shoulder that he had to avoid), he left me alone on that day and ever after.
My new skill came in handy a short time later. There was a bully that went to the same junior high, and rode his bike to and from school along the same route through the Bureau of Standards. It was not a through street for cars, and crossed some undeveloped grassland for about an eighth of a mile. Away from observing motorists and residents, he felt like he could get away with anything -- such as shoving me off the roadway or trying to put sticks in my spokes.
The day he came up and prepared to force me off the road, I simply reached across and placed my right hand on his handlebar stem. It didn't take him long to realize that the situation had changed completely. His nasty/smug look disappeared almost instantly. After I plotted a new course for him that veered gently away (well, maybe there was a rock or two on the shoulder that he had to avoid), he left me alone on that day and ever after.
Dirty Trick #7 -- Making Tracks
My bike route to and from school took me across the Bureau of Standards. The sidewalk entering from King Avenue went through a curb cut and emptied into a parking space that was clearly marked as No Parking, with yellow hatching throughout. But there's always someone....
The day I found a blue Mustang hatchback blocking my path, I decided to leave the driver a message. I took the front wheel off my bike and looked around for a handy mud puddle. After coating the full circumference with black mud, I went back to the Mustang and drew a tire track up the hood, up the center of the windshield, over the roof, down the hatchback and onto the street.
It's an open question whether the driver got the message, but I don't recall finding that particular car blocking my path ever again.
The day I found a blue Mustang hatchback blocking my path, I decided to leave the driver a message. I took the front wheel off my bike and looked around for a handy mud puddle. After coating the full circumference with black mud, I went back to the Mustang and drew a tire track up the hood, up the center of the windshield, over the roof, down the hatchback and onto the street.
It's an open question whether the driver got the message, but I don't recall finding that particular car blocking my path ever again.
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