Top 10 Improvised Movie Moments Of All Time [VIDEO]

I've always had the idea that movies were heavily scripted, but as it turns out, improvisation not only happens, it creates movie magic!

Out of all of these movies, I have to go back to the first one featured... Heath Ledger was a genius! What's your favorite? Jaws was a close second for me! The Taxi Driver line was legit, too... Dang it! I'm conflicted!

P.S. A Clockwork Orange made me uncomfortable...