What kind of/how much gore is in an American Werewolf in London?

The 1981 movie, for that matter. I heard its mediately gory without being too "in your face". I think its supposed to be more funny than gory, so I'm just checking. The cousins are coming over in a couple of weeks and they wanna watch a wolf movie. They've already seen the Wolfman (which I already have on DVD), and this movie's pretty cheap, so I figured what the hell.