A compilation of movie clips using the Wilhelm Scream, a sound effect incorporated into most projects involving George Lucas and/or Steven Spielberg.
The Wilhelm scream is a repeatedly used film and television stock sound effect first used in 1951 for the film Distant Drums. The effect gained new popularity (its use often becoming an in-joke) after it was used in Star Wars and several other blockbuster films as well as television programs and video games.
The Wilhelm scream has become a well-known cinematic sound cliché, and is claimed to have been used in over 140 films.
*UPDATE: The History of the Wilhelm Scream: