Lawrence has some .50 BMG goodness. Some of the videos are silly (does anyone really need to wonder what one of those does to a ballistic gel dummy?), but some are quite instructive about the round's purpose (i.e. what it does to a V8 engine).
Of course, there's always the video of how you can use it to format a hard drive. Or heck, you could just use 12 gauge slugs. Man, those are old posts.