This isn't exactly a prank, but the reations from the rest of the team were priceless!
After our annual dinner last year before finals day in Epcot, one of my teammates made the suggestion of shaving his head. So, we went back to the hotel and using nothing but my travel electric and a borrowed Gilette razor gave him a mohawk! It took almost 3 hours, untill 3:00am to shave him clean.
The next day we gave him a baseball cap and went to the competion. No one noticed untill he got the attention of the whole team and pulled off the hat. Everyone's jaw hit the floor!!!
Our club advisor, Mr. Cokeley, took this picture right after he did it!
The Shaven One