Vivi, that's brilliant. The best I could muster in that relm was to invert mouse controls, and crank the speed/sensitivity to max. Also cranking their "doubleclick" time on their mouse to max so they have to click as fast as possible to select anything.

Here's some of my list. This was while I was in the military, but it's still a lot of office humor. A lot of these were on night shift, because there was a one star loose in the building who would have murdered me.

1) We had an office intercom that dialed from any phone, so I'd play the Jaws theme, TMNT theme, whatever, over the intercom by putting my phone right next to my computer speakers. I'd also put the intercom on hold, and tell someone they had a call on line 2. They'd pick up to say hello, and hear themselves over the intercom.

2) We were "supposed" to starch our uniforms. (This is debatable.) Anyway, that included our hats, and some people would starch them to the point that the hats would hold their shape and coincidentally be water proof. One day I noticed my friend left his hat and car keys in the break room. So I filled his hat with water, tossed his keys in, and left it in the freezer. It had the majority of that 12 hour shift to freeze solid. I laughed, he raged, I left him in the parking lot attempting to break his keys out of a block of ice.

3) This was the military, so I'd always tell the new guys, "Hey, Captain Dee called while you were out. He needed some sort of heads up on weather at your base. He sounded kinda pissed you weren't available. I left you his number." Only it would be the number for Captain D's, the fast food place.

4) There was a phone that was malfunctioning (It wouldn't transfer calls), and they were going to throw it out. I talked them into letting me keep it. So I took it home, glued the phone to the reciever, came back to work the next day, and switched it with my friends phone while he went to the bathroom. I thought there would be harmless shenanigans. I managed to time the call to his desk right as he walked back in the room. So he ran over in a rush, and smacked himself in the face with the whole phone trying to answer it quickly. I feel kinda bad about that one, but everyone laughed. Even him.

5) As a group, we convinced one of the new guys he needed to take a "ground level air sample" so we could take it back to the "the lab" (there was no lab, just the vault for secret operations, but new guy didn't know this) so it could be analyzed for percentage of condensation nuclei, pollen, etc. Basically he was running around in the parking lot with a trash bag while we watched from the upstairs windows.

6) I had a new team lead, a very gullible lieutenant, so I decided to mess with her. I took all the staples out of my stapler, and rolled my chair over to where she was eating at her desk. (Plain oatmeal, everyday, she had the prank coming.) I started off with "Lt. Hettinga, this stapler seems to keep jamming, and it's driving me crazy. I'll try to use it and it just......AAAUUGGHH!!" At which point I began stapling the stapler over my head and arms. She freaked out for a good thirty seconds, and it was a good time had by all.

There's others, but that's some of them at least.