In the recent issue of Men's Health magazine there is an article titled "Crash and Learn." The article, written by Michael Perry, a volunteer firefighter and EMT, describes 27 ways to keep disaster in check.
One item that stood out for me was that if you are involved in some sort of a car fire (car fires make up 20% of all fires), never remain directly in front of or in back of a burning vehicle, as shock-absorbing bumpers can overheat and explode with enough force to crush your legs.
Probably not likely it would happen, but a dangerous situation I was not aware of.