Wilhelm scream

The Wilhelm scream is a scream sound effect which was introduced in the 1951 film, Distant Drums. It is used as an in-joke as it appeared in many animated films, most notably from Disney and DreamWorks Animations, comedy films, action films, and all Star Wars films. It has appeared in many Pixar films and is most recently used in Toy Story 3. The running gag is similar to other Pixar running gags, A113 and the Pizza Planet Truck.

Pixar films that uses the Wilhelm scream

 * Toy Story (1995) - When Buzz Lightyear gets pushed out the window by a lamp.
 * Cars (2006) - When a car gets zapped by a lazer during Lightning McQueen's flashback.
 * Lifted (2007) - During the end credits.
 * Up (2009) - When the dogs are falling off a cliff while attempting to chase Carl Fredricksen and Russell with the bird, a wilhelm scream can be heard.
 * Toy Story 3 (2010) - During the opening scene, while Andy and his toys are watching a "scary movie", a wilhelm scream can be heard.