A young Chuck Norris takes on Bruce Lee in “Way of the Dragon.”

Whether it’s Indiana Jones knocking out Nazis or Neo taking on Agent Smith in The Matrix, everyone loves a good fight scene. There’s something primal about it – something deep that appeals to our sense of right and wrong. And the best bit is that climactic knockout blow. The moment it all comes to a crushing end and the theme music starts playing, as the hero turns to the crowd victorious, and the villain is sprawled out on the floor, defeated.

It’s not just action films, either. Sometimes, even comedic brawls end with a bang, and more serious movies have also featured iconic knockout blows. Here, we celebrate the 15 greatest KOs in movie history.