I got chatting to a Norwegian student at university. Apparently, one summer when he was a lad, he cycled to a ski resort with his mates. They were looking at a big ski jump and one of those 'mates' dared him to ride his bike down it. Being young, foolish and wanting to show off, he agreed to do it...
He remembered thinking at one point that perhaps that wasn't the best decision he'd ever made! He landed badly and the bike disintegrated beneath him. I can't remember the full list of his injuries but it certainly included broken arms and legs, collar bones, ribs, fractured skull, internal bleeding. He spent the best part of a year in hospital.
I reckon that he was very lucky to survive. The way I look at it - cowardice exists for a reason!