Source - Geekologie:
This is a video of a car salesman demonstrating the child-safe sliding door on a minivan by sticking his own neck in the closing door. While it may be still be child-safe, it doesn’t appear to be adult-safe. That’s why you always have to read the fine print. You know, I remember when I was a kid I closed a sliding van door on my brother’s hand. I thought for sure he was going to lose all his fingers, which would have been awesome because then I wouldn’t have had to wait for his turn to play Nintendo.
Thanks to Mark V, who agrees maybe he should have tested it with a broomstick first.