A handshake is a simple gesture 99% of the time, but in movies where every second counts, they can be used for many purposes: to come to an understanding, establish dominance, plead for help, get a laugh, or show off some cool moves. A skilled actor can take that simple gesture and give it a world of meaning. If you didn't catch that meaning the first time around, TVOM has selected five scenes (with videos) that tell an entire story in a handshake.