What Are the Best Unscripted Movie Moments?

Raiders Of The Lost Ark 1 of 16

One of the most famous cases of improvisation takes place in 'Indiana Jones and the Raiders Of The Lost Ark.' Jones (played by Harrison Ford) comes across an enemy who starts showing off his skills with the sword. Ford wasn't feeling well that day, so instead of engaging him in the scripted fight, he just pulled out his gun and shot him. The swordsman was so shocked that he just fell over.