For those of us hardcore movie nerds we know about a little thing called The Wilhelm Scream. If you watch movies in general, then you've heard it and never even knew. Someone uploaded a nice little video compilation on youtube. This is awesome, and I'm fairly upset that I didn't do it first.
Find out what The Wilhelm Scream is here.
Now watch the video.
I had to start laughing the other day because I watched 3 trailers in a row and they all had The Wilhelm Scream in it.
God bless you Ben Burtt for bringing it back through the Star Wars movies.