I learned to drive in 2004, and they showed videos of the gory aftermath of high-speed car crashes. I vividly remember seeing brains smeared all over pavement in one clip. It freaked me the fuck out, and definitely got me to appreciate my own mortality, and how fragile the body is. I've paid attention on the road since.

Don't know what they show kids today. Teletubbies bouncing around in a bouncy castle?