All I know about crash test dummies I learned form those buckle up commercials when I was a kid. You can learn a lot from a dummy. We have all seen footage of cars undergoing crash testing with dummies in the car to simulate the effects on passengers.
I have wondered before if the dummies require lots of maintenance, I mean they do get crashed and crunched a bunch. GM has offered up a video that takes us behind the scenes with the folks who work with its crash dummies.
GM has about 200 of them that are used for various tests. Check out the video below and see what goes into maintaining the dummy hoard. The scene where the dummy gets nailed in the chest by that huge metal beam makes me hurt.