To add to the list, a friend of mine is an enormous Kevin Smith fan, and he regularly watches, in addition to his DVD copy, the TV version of Mallrats. Jason Mewes's lines are great. Must have taken forever to edit him down.

My favorite airline edit is when I watched Love Actually on my flight to Europe. They actually managed to take out the entire storyline of the two soft-core porn people. It slipped my mind until the movie was over and I realized that they hadn't shown up yet