[Esther]

Originally Posted by RandyWayne

Even though they don't have the same punchline as a written joke, I keep thinking of some of the best practical jokes I've seen (and occasionally done) on others.

Best one I heard of:

During the late 80's a couple of Microsoft employees would go into their managers office and add a new layer of drywall and paint to one wall in his office, effectively shortening the room by about 6 inches. They did this every few weekends for a couple of months. The guy never noticed (or so he said) until the room had shrunk by several feet.

Another good one described (but am sure didn't REALLY happen):

Jim adds a few quarters to Dwight's phone every other day, and then removed them all one morning causing Dwight to hit himself in the face when answering.

One I did:

Add a small program to a co-workers computer which inserted random characters into whatever she was typing based only on how fast she typed. The faster she got, the more misspellings. When she backspaced to correct them, the characters appeared correctly. This was great fun!

And you lived to tell it. Amazing!