We've all been there before. The door that we're walking in clearly says "Push" and you do just the opposite and pull, or vice versa. It's an honest mistake, yet an embarrassing one. Luckily, though, it's over in an instant and you can go about your day.
This would-be burglar in Chicago did the same thing recently when he tried to break into an establishment. After using some tools to break the lock, he then grabbed the handle and started tugging on the door as hard as he could. For several minutes. Completely ignoring the sign directly in front of him on the door that clearly said "Pull". He eventually just gave up, cut his losses and went on his way.