When I was a senior in high school, I was driving home in a snowstorm. It was one of those wet slushy snows that melt when it hits the pavement so you underestimate how bad the roads are. There's this corner on a street near my house, I've taken it literally hundreds of times throughout my lifetime. It's a 90 degree turn, but a gradual curve obviously. As I began to take the corner, I noticed a layer of snow taking up the entire right hand shoulder, so I took the inside of the turn to avoid hitting the snow and possibly losing control. This entire corner is in thick woods and you can't see around it, so when a car came around in the opposite direction and I was basically in the middle of the road, I jerked to the right to get back fully in my lane, hitting the snowdrift in the process. I immediately lost control and slid straight into the woods at around 45 mph. The first tree flipped me on my side where I proceeded to roll twice until the 3rd or 4th tree stopped me. I regained consciousness to the smell of fire (turned out just to be the airbag exploding), and realized the car was still on its side, drivers side down. So I positioned myself and kicked out the passengers side window and climbed vertically out of the car. I apparently broke a rib and had a bloody face (from my nose I think), but i didn't even notice that until a couple hours later. Adrenaline is a freaky thing. Yeah, very scary moment for me.
The police officer on the scene later told me how lucky I was, about how he'd seen dead people pulled out of cars in a lot better shape than mine was. The car basically looked like it had just gone through a garbage compacter. He also told me the first tree I hit saved my life because it was completely rotted and significantly braced my impact.