Nothing too exciting
As a kid, riding along the pavement at the side of the A4 next to a mate, decided it'd be a great idea to hold onto each other's handlebars and steer the other bike. Within approximately half a second he'd veered off to the left into a wall and I went in the opposite direction, off the kerb, off the bike, diving horizontally towards the inside lane. Instantly there was a huge roar, something big and red flashed before my eyes, and I kind of got spun around in a bit of a gust and landed in the gutter with my ears ringing. Got up, picked up the bike, and realised my mate was staring agape at me. Apparently a car doing about 60 had sped past, and the 90 degree-ish corner of the roof/side window had fitted almost exactly into the 90 degree-ish gap between my head and right shoulder, missing me by about an inch. He thought for a second the car had passed right through me and that I was some kind of indestructable superhero, before realising that we were in fact about 12 and old enough to know that such things are not really real, really.

Funnily enough, as soon as I understood how close I'd just come to having my head taken off I realised that I had seen a big tunnel with a white light and a stereo, mug, ice cream van etc etc, oh actually I can't be bothered to carry on with this last bit, I'll just stop now.
(Ali Bongo 9000 Ali Bongo 9000, Tue 30 Nov 2004, 13:56, Reply)