Sandler fighting Ford! Schwarzenegger versus Blade! Bruce Lee pummeling "Rowdy" Roddy Piper! Brad Pitt beating the shit out of Brad Pitt! All now realized and set to music, thanks to exciting advances in split-screen technology and the remixing of Eclectic Method.
I haven't looked around for it, but if I know The Internet, someone has already crudely done this with pornography, and it's probably pretty weird.