Terminator 2 Deleted Scene
Van Ling (Creative Supervisor), in T2, the Book of the Film, An Illustrated Screenplay:
Another of the major lifts from the film was the "smile" sequence at the roadside stand. Although the sight of Terminator trying to smile was on of the funniest moments in the film, the lead-up to that payoff was too long and hard to cut down, so the entire scene was omitted. The film now cuts from their station wagon pulling up to the roadside stand in Scene 96 to Sarah eating her hamburger in silence in Scene 98.
The roadside stand sequence was reduced to its essentials during the editing process. In tightening the film, the need to maintain the forward movement of the story --establishing the character's destination and motives now that they have escaped (temporarily) from the T-1000-- took priority over the more humorous attempts by John to teach Terminator how to be more "human"; this included the "smile" gag, which paid off in a big laugh but took over two minutes of valuable screen time to set up.