Life is all about subtleties, but some people never get them. Instead they plow ahead with a cardboard box on their head chanting the song "Macho Man" over and over again until they get hit by a city bus.

The people responsible for the funny mishaps here are all those kind of dimwitted individuals. But as annoying as they are to deal with, they definitely make life more fun and entertaining, so they're not all bad.

Scroll through some prime examples of human stupidity, and be thankful you didn't end up on this list.