Various ninja assassins had been stymied by the puzzle of how to cut though that duct tape...OH BOY NOW IT'S GONNA BE EASY! (shhhhh, ninjas are quiet, almost forgot)
Don't want to be a killjoy, but "mongoloid" is a pejorative term for a person with Down syndrome. I know we're all irreverent and everything, but I'd like to think you have better judgment than to write that someone "has the strength of twenty retards," which is pretty much the same thing.
I don't want to necessarily kill anybody but wouldn't mind wearing someone's skin. Do you have any great, big fat persons there?