I was out on downhill run with my dad and his friends, one of which is an Ex-Jockey. I thought it would be a laugh to speed past the ex jockey whilst slapping my arse pretending my bike was a horse, it was a fairly narrow downhill path and as I was level with him I saw his face change from laughter to horror. A split second later a slammed straight in to a huge rock whilst I was paralell with him, which was jutting out on to the path. A trip to the hospital was in order, but it was just some dressing and a few stiches.
The stick I got afterwards from all my dads friends was definitely worse than the injury itself.