As Action and Action's patriarch figure travels back from his extended tour around the land of snogs, scarves, and casual attitudes towards dental hygiene, here's a cool video that has nothing to do with any of that.
There's all kinds of compilations of the Wilhelm scream on youtube, but I found this video to be the most interesting and informative, though they fail to mention its common use in video games as well.
Years ago I brought this familiar scream up to a film studies friend of mine who said 'Oh yeah, the Wilhelm scream.' I always wondered how he knew that, and in the back of my mind thought he could be making that name up to sound knowledgeable. Score one for him.