We did a 'Super Centurion' at a staff party for a ski hill I used to work at. It was the same as the century club, but with an added rule that you could not use the washroom. If you went pee, you were out.
I made it to 87 and could have easily finished it, but I could not hold it in any longer. The need to piss was the strongest and most intense that I have ever experienced.
3 people finished, but we declared a single winner. After the 100th shot, 1 of the final contestants sprinted for the washroom, another ran outside and was pissing and throwing up simultaneously. The 'winner' stood up, walked over to the keg, grabbed a pint glass, filled it up, and sat back down. He casually finished his pint and then walked slowly to the bathroom where I am certain that he enjoyed the piss of his life.
It probably helped that he was 6' 7".