It takes a very high level of stupidity to think putting your child in a dryer and turning it on is funny. But that's just what this father did. And when he turned the machine on, he didn't realize that it had an automatic lock on it, rendering him and the mother helpless to open it.
The child is fine, suffering only minor injuries. But this could have ended much, much more tragically.
On the bright side, this kid has a pretty cool story to tell his new foster parents next week.