18Entry by AzISeeIt
17Entry by Paka
Not enough credit goes to film editors. These are the folks who are responsible for polishing turds into Academy Award winning films. They allow us to keep our disbelief suspended by making sure none of the filmmaker's dumb mistakes make it out of the editing room.
To exemplify this point, we asked our readers to take some of cinema's most memorable scenes and tweak them just a tad, rendering them into unwatchable mistakes. The winner is below, but first the runners-up ...