i've had a couple....
when i was 5 years old i was bit by a dog on my face. supposedly if the dog's teeth had sunk in like 3 centimeters or something to the right i would have gone blind and been a vegetable (basically dead lol)
also, about a year ago i was in the car after school (mom picked me up) and we were in the Miata (a really tiny car). anyway we came to stop light. when it turned green, for some reason my mom didn't hit the accelerator for a second or two, the next thing we knew, the guy in the lane next to us who had accelerated immediatly when the light turned green, got smashed in the side by a red light runner at about 45 miles per hour. if we had taken off right at green, we would have got crushed between the 2 cars. and trust me, in a Miata, we definetly would have been a pancake.
maybe more, can't think of any...