12. Mario Kart
https://www.youtube.com/watch?v=d90LCX_n4Jg Given the man's occupation as a plumber, you can probably imagine the sort of bacterial gunk that collects on Mario's prodigious mustache. Slime, mold and last night's lasagna - the little dude's crumb catcher is a breeding ground for hepatitis C, and after mowing down a dozen or so helpless bystanders, those bristling handlebars can feed a coven of vampires after soaking up enough blood to leave Dracula hungover for the next century. With this mod, you can disappear under an impressively detailed Mario mask, and hop into a go-kart for a few rounds of 'stomp the Goomba', i.e., crush a gaggle of panicked onlookers. Somebody grab the tennis racket.