This is not an office prank, but is very funny if done correctly. When out at a restaurant with a group pick one person as the victim. Everyone but the target needs to be in on it. As the after dinner conversation unfolds everyone takes opportunities as they occur to move each and every item on the table – little by little - until everything is in front of the one person. I have engineered this prank on multiple occasions and it is hilarious when the target finally realizes what is happening, and a lot of fun while it is progressing too. At a New Years Eve dinner many years ago with four couples, seven of us managed to get absolutely everything jammed together in front of one person. Took us about 45 minutes, but we had a great time and still talk about that prank.
I used to work at a semiconductor manufacturing plant in Phoenix back in the early 60's. I had the thrill of working second shift (4:00PM - Midnight). Well, on Friday nights we normally took off about 11:30 and gathered at a bar across the street for some pool, beer, and chatter.
Some one would get there first and order a pitcher to get it going and rack the balls.
Well, after a few weeks we noticed that one fellow always managed to show up about 5 minutes after the festivities started. AND he always seemed to leave before the last pitcher was ordered.
His comment was always, I will get the next one."
One night after we figured out his little game, we ordered about 10 pitchers but paid for none, telling the barkeep of our plan and that was to finally get Marsh to buy.
Anyway, about 12:45 (bars closed at 1AM then) we all began wandering out. One guy had to leave, another went to the potty, a couple went out to check a 'car problem', etc.
Then the bartender hit him with a bill for $17.50 or so. Now this wasn't a weeks pay but it was a noticeable amount for us grunt technicians. Most of us were in the $90 after taxes range/week. (God, those were the days)
From then on, he was always the first on the scene.