Everyone knows classic movie moments, such as the scene in Taxi Driver where Travis Bickle looks into the mirror and asks, "You talkin' to me?" but did you know that one, and quite a few more of your favorite movie moments were improvised? Marc Russel has put together a list of classic movie moments that were not in the scripts.

Scriptwriting isn't easy. Some people spend months trying to perfect a specific scene, trying to write that perfect line that sticks in the mind of those who hear it. Then these guys come along and do it off the top of their heads.

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From the Upcoming ueue, submitted by pvrussel.