Unlike television, real accidents can cause suffering so real and vivid that those persons involved or witnessing rarely forget the flow of blood, broken limbs, crushed bodies, or screams of pain. An accident without injury though is more like the bloodless, painless Hollywood version and therefore easy to forget. In 1931, H.W. Heinrich theorized that for every major accident there are 29 minor accidents and 300 near misses.

 What To Do About Near Misses