Oh I just thought of one I once sat on a wall and fell off backwards and brained myself at the time it was very painfull and I was lucky I didn't get a concussion, but that would crack most people up, needless to say it was a tall wall and I was a tad drunk. oops :/ misspent youth.
Crack SAS troop movements whilst drunk over a library roof at the university near my house, the roll down the tiered roof to the edge was hilarious, even if my friend only just stoped at the edge of a sixty foot drop, it was damn funny. Also under the influence.
Theres nothing in particular apart from hijinx I'd be that proud of. I'm sorry but my triumphs are pretty much internal and wouldn't make good viewing.