Not me, but a friend
One of my friends, lives out in the country, and has quite a large back garden (2 or 3 fields to be precise). He has a quadbike as well.
Naturally, being 16 year olds, we spend quite a lot of time there. On of my other friends and I were over at the guys house, and he was riding the quadbike particularly fast, round and round one of the fields.
Well, it had rained the previous night, and as he approached one of the particularly muddy bits, the quad lost grip. He started spinning round, went through about 90 degrees before one of the wheels hit something.
Despite the fact I was merely watching this from a distance, well out of the danger zone, for me time slowed down. The quad started to flip over, and my friend was thrown out of the seat. The quad continued flipping, and he hit the ground. He lay there dazed for what seemed to be about ten seconds, but couldn't've been, because when he rolled out the way the quad (continuing its original flipping) landed right where is head was. Then it bounced, right over where my friend was now standing, and landed stuck in the mud.
Then the friend whose field and quad it was came over the hill and asked if he missed anything, while I was pissing meself and the other friend was in the middle of the scene looking particularly angry.
It turned out he wasn't angry at the accident, but that he didn't get any sort of near-death experience at all.

Edit; Oh, and there was the time at school we had the meningitis C vaccine. Just as they stuck the needle in, they explained that the vaccine was just some form of the disease that wasn't supposed to be harmful, so your immune system could cope.
I wandered out feeling okay, but hating needles even more than I already did. I walked along the corridor, then started feeling a little woozy. I met a couple of girls from my year, and promptly fainted into their arms.
Needles to say, out of the hundred or so people getting the vaccine, it was me alone who actually caught the disease from the vaccine. Bloody NHS...

Apologies for the length.
(Duke Flipside Bidet to you, sir, Sat 27 Nov 2004, 19:58, Reply)