I will tell one of the good ones.
I was working as a mechanic at a smaller shop just out of high school. I came out of work one night and got in my truck, it was a 76 power wagon with a BB 400. I fired it up, got some oil pressure and put it in second and let the clutch out. Nothing happened, I took it out of gear and put it back in, nothing. I tried 3rd, 4th and reverse, still nothing. I checked to make sure the transfer case was in gear, even 4 low got nothing. I get out and look under and something was not right but it did not hit me looking under it in the dark. I happened to look in the bed and there are BOTH of my drivelines, U-joints taped, with a bag with bolts. I was livid, my buddy that I worked with got off a couple hours earlier than me and he had gotten me good. I unlocked the shop to get some tools and put it back together. I waited about a week without saying a word until he was working late and I was not. He had a 71 Chevy, points ignition and the key in the dash. I took a wire and ran it from the housing of the ignition switch through the dash to the coil wire, stripped it back about an inch and stuck it in the coil before ramming the coil wire back in. This guy had a habit of starting his truck and immediately revving it up a couple of times. He got out late, turned the key and it would not start but it sure gave him a wakeup!!! I was hoping it would have started and he had gotten it to rev!
The next day at work he was MAD! I nearly wet my pants listening to him tell me about it. He said it shocked him so he let off the key, but had no idea what was going on so he tried it again!!! There were several rounds before this with messing with each others trucks, but it never happened again!
Young and dumb was fun, and we lived to tell about it!!