[oxymoron: Nerd Humor]
The setup: When I was working in communications electronics it could take 2-3 days to get all the electronic test equipment hooked up and configured. The test bench resembled the cockpit of a 747. When a tech finally got the whole bench all setup and ready for testing it was usually celebrated by taking a short break. While the tech was gone the others would find one subtle but critical cable, disconnect it and insulate the center signal pin then reconnect it. The betting was along the lines of a. how many hours it would take for them to find the problem b. how many days it would take c. how long before they asked for help. Now for the real practical jokes --
Once the culprit that broke the test setup was identified tricks were re-gifted to the perpetrator:
A construction crew was installing new fire extinguishers using ram-set guns to drive in the nails. Ram-sets use a blank cartridge from .22 cal to .38 cal, they are just like the rifle and pistol loads, but with a nail taking the place of the bullet. One tech in the revenge business took a couple of the .22 cartridges, less the nails, over to Bad Tech's bench (the one that broke his test setup). He carefully took a small gauge wire and wound it around the base of the rim-fire shells and then connected the wires to his bench power supply and set the power supply for full output. The next morning, at 6:45 am the blurry eyed Bad Tech comes in, sets down at his bench and flips on the power supply. The supply quickly heated the wire, thus firing both cartridges at once, just inches from his head. The results looked like a cartoon where a persons body flies apart then rejoins again. The tech enjoyed a full body sprain for several days afterwords.
Revenge II: Another tech needed to get it. The tech to deliver it went out and purchased a couple of boxes of flash bulbs (Remember those? This was a long time ago.) He very carefully attached the bulbs to the bench top, then up and around the shelf over the bench and down the other side. Then connected them all together and connected the bulbs to a power supply in such a way that when the bench power was switched on the power supply would switch on too. On an early morning the tech switched on the bench. When all the bulbs went off at once it initially looked like his hair was blown backwards, then his chair flipped over backwards leaving his feet sticking straight up in the air. Fortunately he wasn't hurt. It took a long while for him to get all his vision back.
At another company we had a Big Manager who was a former pro hockey player, a big tough guy. He had arachnophobia (fear of spiders) real bad. One day we found him standing on his desk shrieking like a little girl because there was a spider on the floor. He had a bad habit of never looking up from his desk when you came in to talk to him. He would answer you, but kept on writing and working. Almost every time, without looking he would reach into his upper right desk drawer for something and continue to not look at anything but what he was working on. Sooooo, when he went to lunch we took a large lobster, removed the bands from the claws and put it in his desk drawer. Shortly after he came back to work we had our patsy walk into his office and engage him in a conversation. All of manufacturing found an excuse to be just outside his office window. Sure as **** heck, without looking he opened the drawer and reached in. He levitated out of his chair and ricocheted off the ceiling, then overturned everything in his office as he streaked out the door making noises like a steam whistle.
There were always the little things, like remapping the executive secretary's keyboard so that no key produced the letter or symbol on the key. Filling desks with Styrofoam peanuts. One weekend the maintenance workers came in and removed the door frame from the maintenance manager's office, sheet rocked and painted all the new drywall. As a nice touch they left the window so he could look into his office and see a critical job memo on his desk that needed immediate attention but he couldn't get to it.
We had a braggart assembler that was better than anyone else -- until we replaced all the loose hardware in his kit with left-handed screws. Everyone told him that nothing was wrong, that he must have had a stroke or mental breakdown.
We had a very important customer coming in to evaluate our business with the potential of hundreds of millions of dollars worth of orders. Not knowing this, the guys in final assembly had spent several hours filling rubber gloves with helium, tying them off and letting them float to the ceiling. Many got painted and adorned with business inappropriate graphics. The entire ceiling looked like a bottom view of a milking herd with a few looking like a male adaptation of Shiva. We did get the order. The guys that decorated the ceiling did come to regret that little joke.