The Wilhelm scream

I was recently rewatching "Kill Bill", and I noticed that a sound effect used during the Crazy 88 fight scene was very similar to the one used in "Star Wars: The Return Of The Jedi", as a man is thrown into the Sarlacc pit (a sound heard during a good half of my childhood) . After some research, I discovered that the two sound effects were the same, and had been used in countless films, including at least four times in various "Star Wars" films. This video (not complied by me) should give you a good idea of what the scream is.

Although i'm not sure how I would relate this to any of our projects, I find it interesting that a sound device can be used in so many different popular films with so few people noticing. The effect is now a cult tradition for sound designers. I also noticed that it was in a lot of Spielberg's films, much like the shooting star which also features in most of his films. If there is no copyright on this, I would like to use the effect for our thriller simply for the link to so many famous films, although I am not sure where I would put it.