I'm pretty sure I was born with "tuck and roll" programmed into my brain. When I was 5 I un-buckled myself, opened a car door and fell out on a freeway off ramp. My mom says she remebers looking out the back window and seeing me balled up, bouncing and rolling down the road like a basketball. I jumped up and ran after the car, I remember bieng afraid they were going to leave me. I've been in a number of pretty bad BMX and MTB wrecks, a motorcycle wreck and fell off a 15 foot cliff. Tuck and roll saved my ass every time. I've had tons of lacerations, bumps, bruises and even been knocked out a couple of times (I should practice the arm over the head thing), but I've never had a broken bone.