Let's not try this at home, unless you're in the market for another door and some repairs around the house. But lets just say you have to break one, to save a child from a burning building, or to save someone else in trouble in the other room, breaking down doors isn't as simple as it looks in movies.

The Art of Manliness shows us the proper way to do it, all without getting ourselves injured. There are a few things you'll need to note before you go all action movie star.
Check to see which way the door opens by checking the hinges. If the door opens towards you, kicking it down is going to be next to impossible. Kicking a door down is best employed on a door that swings away from you.

Kick to the side of where the lock is mounted (near the keyhole). This is typically the weakest part of the door.
Check out the illustration above, or if you need more information, head over to the link below.

How To Break Down A Door