Rick Rubin might not be human. The legendary producer accepted Eminem's Ice Bucket Challenge request, but instead of simply dumping a bucket of ice and water on his head, Rubin filled an ice bath to the brim with buckets of ice and freezing water and proceeded to jump sit in the bathtub while more ice was added. Because he is Rick Rubin, he didn't even freaking flinch once, in fact it looks like he's almost...meditating? Following the completion of the task, Rick nominated Frank Ocean to go next. Good luck topping this one, Frank.