Mini Motorbike
I had one of those little mini motorbike things, for their size they were very nippy, could hit about 45mph on a long stretch, and you looked like an absolute pilloc riding it. Now i have a friend who is very accident prone, and i let him have a go on it. We took it to this long straight stretch of tarmac which was empty every day apart from dog-walkers in the morning so that was where we would always ride it. As soon as he got on the bike he pulled the throttle right back and attempted to go as fast as possible as soon as possible.

The tricky bit is there's a large speedbump in the road and we would overcome this on the little bike by squeezing through a gap in the middle of the speedbump where it was just flat road. He attempted to fly through this eye-of-the-needle at 40mph and as he did he clipped his shoe and the bike began to wobble which he then lost control of and fell off. He rolled, not on his side, but head-over-heels forwards for a good 10 feet before crumpling to a stop. He didnt have any skin at all on his forearms, just red tissue where the tarmac had grated it all off.

EDIT: Another story involving a mini-bike

My friend had a mini-bike which was like a chopper. It was slightly bigger and capable of going a bit faster than mine. So we took it to this uneven road full of potholes and gravel and decided to tow my friend from the back of it while he stood on a skateboard, he's never stood on a skateboard in his life.

All was going well until we reached about 35mph and we hit a pothole, the bike handled it, my friend on the skateboard didnt and he fell off.

Well he didnt exactly fall off, he was still holding onto my shoulder being dragged along the rough road, it was the equivalent of being dragged across a cheese-grater. Eventually he let go and rolled to a stop and we took his battered body home to the bathroom to inspect his wounds.

He was covered in grazes and deep gashes, he had an extra asrehole carved into his back. We set about cleaning the wounds with disinfectant, i sprayed some Lynx into his back-arse and he screamed like a woman. Due to our lack of bandage we covered his wounds with some sellotape and toilet paper and he was good to go. Even more pain the next day when the toilet paper had healed into his scabs.
(Pimp my Clown is going back to the future on, Fri 21 Dec 2007, 0:44, 1 reply)

Fuck,
that tiolet paper bit made me wince most of all!
( Sir Pigeon Nipples Did you sit in some sugar?, Fri 21 Dec 2007, 1:14, closed)