Have you heard the Wilhelm Scream?
I found this video through Net@Nite, one of my favourite podcasts, though I had heard about the scream before. If you don’t know what the Wilhelm Scream is, it’s a distinctive scream that’s been used in Hollywood movies for over 50 years. For studios it’s easier (and cheaper) to recycle the stock scream than to pay voice extras to record new sound effects; it’s become something of an in-joke among sound designers and lots of movie fans try to keep track of where it’s been used. The current count is at over 130 films!
The list in the video only goes up to about 1999 and I know a few more since then; the Wilhelm Scream features in both LOTR: The Two Towers and The Return of the King, as well as King Kong, Sin City, Kill Bill Vol. 1 and Hellboy. It’s been used prodigiously by Ben Burtt and Skywalker Sound as well, so it’s also in the other Star Wars prequels. Whether it will be in Indiana Jones and the Kingdom of the Crystal Skull or not will be interesting - Burtt has said he’s not going to use it as much now it’s so recognised, but it’s in the other Indy movies so he might go out with one last bang… or scream.
It’s just a fun piece of trivia, but I like it because it shows not so much a lack of originality as a respect for Hollywood’s past; it’s keeping some of the history alive 50 years later and in this digital age, that’s a nice touch. So have a listen the next time you play a DVD; chances are you might be listening to a little piece of movie history. 
Dean on 
I learned about this through Digg and now I’ll never be able to hear that scream again without going “Wilhelm!”
CJ: Yeah, that’s kind of the downside, isn’t it? It’s like listening to a DVD commentary; you learn a lot about making a movie, but you also learn a few things you didn’t want to know, or that change how you watch the movie. It’s funny how often you start to notice the scream when you know about it! Thanks for commenting.