Curious who here knows about The Wilhelm Scream? It's an old, public domain sound that occurs in a massive number of movies. The name comes from a scene in a western where some names Wilhelm is shot, although that is not actually the first film it was used in. Here's just a small sample of it's use. Once you know it you'll spot it all over as it is still cropping up in new movies.
https://www.youtube.com/watch?v=cdbYsoEasio&t=12s
https://www.youtube.com/watch?v=cdbYsoEasio&t=12s