#2. The original opening scene for The Incredibles featured the Parrs at a neighborhood barbecue when Bob accidentally chops off his own fingers and doesn't feel a thing, thus revealing that he's a superhero.
#3. In Frozen, there was originally a scene where Elsa uses her powers to torture two of Hans' guards that come searching for Anna.
The scene is known as the "Black Friday reel" because Toy Story's creators showed this reel to studio executives on Black Friday in 1993. The executives, including Roy Disney, were so horrified with this scene that it caused creators to re-think Toy Story completely.