Not things i've doen myself, rather maing somebody do them when he's drunk,
A mate of mine will do anything if you dare him and call him a wimp or soft etc if he wont do it then thats it, he does it!
Best ones were:
1. We were walking home from pub and i said 'Go on Kev, dare you to take all your clothes off and go in the takeaway and order something that will take like 15 mins to cook and juts stand there, so hes goes in stark bollock naked and orders a load of Bhajis i think, people coming out there pissing themselves.
2. Best one was at Bell Vue dogs a few years ago, dared him to take his clothes off and run round the track, the place was pretty packed and he did it! He was rapid round the first bend lol. Best bit about it was there was a young kid with his dad sat behind ud and the kid said 'Dad, is that a man or a woman!!!'.