Have you heard this before?
It is very likely that you have heard it but not have heard of the Wilhelm scream by name. The scream was originally heard in the 1951 film Distant Drums but that brief clip of the scream got its name when it was re-used for the third time in the 1953 film The Charge at Feather River when it was put in the mouth of the character Private Wilhelm.
It then became popular as a sound effect in many films and later became a kind of in-joke, especially favored by filmmakers George Lucas, Steven Spielberg, and Quentin Tarantino.
Here is a compilation of the scream in some of the 200 or so films in which it has appeared.
Listen for it in the next film you watch.