I've had two fairly close brushes with death.
First when I was maybe 10 or 11, I rode my bike off the sea wall and full a good 15 feet onto my face. Got some pretty nasty concussion and what not, and I looked like TwoFace (not kidding either, one whole side of my face was just solid blood, the other was fine) for a month till it healed. Luckily no scars. According to my mother who saw it (I don't have those memories for some reason

) the front tyre of the bike hit the concrete just before I did, so I didn't take the whole impact. So maybe I might have died if I was leaning forward more when I went over.
Second was a car crash when I was 18. Well I say car. My car into a coach that had turned across both lanes to get around a sharp bend. Predictably this ended badly for my car and not so bad for the bus. Anyways, the car was totalled (thing crumpled like a beer can) and I broke my wrist and got some whiplash. My passenger faired rather worse, and had the seatbelt lock against her neck, and although she didn't die (or even get a lasting injury) she had a a big friction burn/bruise on her neck for ages that looked like she'd survived hanging. Creepy shit. Anyways, I count that as a brush with death, if only because this was how I discovered my airbags didn't work.
Edit -
Also, to those who've never had both at the same time: Really serious bruising is a metric shit ton worse on the pain scale than a straight broken wrist, and if you get both together, you won't know you broke the bone until you try and sign police documents with what you think is the non-injured hand. My right hand went through the dash panel, and although didn't break anything HURT like a ************ for weeks after. My left hand went off the gearstick into the stereo column and neatly snapped at the wrist, but it figured I had enough to deal with so didn't let me know.