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Sid's dog is named "Scud", a reference to missiles that carried biological warfare substances used by Saddam Hussein when he opened an attack on United States allies during the Persian Gulf War of 1991.
Sid Phillips is said to be inspired by a former Pixar employee of the same last name who was known to disassemble toys and use the parts to build bizarre creations.
This was the first animated film in Oscar history to be nominated for a Best Original Screenplay Academy Award.
When Woody is sitting on the bed talking with Slinky, there is a drawing of him on the wall behind them. This is actually an early sketch of the Woody character.
Billy Crystal was originally offered the chance to voice Buzz Lightyear, but declined. After seeing the finished film, he said the decision was the biggest mistake of his career. Upon learning this, John Lasseter telephoned Billy's house to offer him the role of Mike Wazowski in Monsters, Inc. (2001). Billy's wife answered the telephone and said "John Lasseter wants to speak to you". Billy took the telephone from his wife and said "Yes".
The animation team perfected the movement of the toy soldiers by nailing a pair of sneakers to a sheet of wood and trying to walk around with them on.