Well I've been relatively lucky in comparison to some of you guys! But the most memorable one for me was when I first started trials riding. I was out on the street just getting used to pedal hopping (lurching) up and down curbs and across grids, just to get used to it. I was trying this one hop over a grid when my foot slipped off my pedal. The pedal spun round and stuck in my knee, clean through my trousers and left 4 deep puncture marks in my knee cap. I remember lying on the floor thinking I had shattered my knee cap with blood all down my leg, I could barely walk. Thankfully it wasn't and I was back riding the week after. Not as bad as some other injuries on here, but I learnt my lesson not to ride in the wet again!! Haha! I'le try to get some pictures up of the scars. Still got them 6-7 years on.