In another scene, Schultz loses his temper and smashes his face into a mirror over and over again in an explosion of blood and glass. It was an incredibly intense moment, and it wasn't in the script at all. Tatum's character was only supposed to smack himself in the head a few times. But when it came time to film the sequence, Melpomene, the muse of tragedy, sunk her maniacal fangs into his brain, and he headbutted the mirror so hard that he put a hole in the drywall behind it. The blood in this scene is real, because as we mentioned, Tatum put his head through a wall, through a mirror.
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Uh ... We had a joke, but are too scared to make it ...
Tatum blurred the line between actor and psychopath so well that he even wound up injuring Ruffalo, who by his own admission was already intimidated by Tatum's size, and was given no reason to question his fear after Tatum destroyed a mirror with his face. During one scene in which their characters wrestle, Tatum attacked Ruffalo so fiercely that Ruffalo suffered a permanent neck injury. It is unclear whether this was payback for the eardrum thing, but the scary thing is that it probably had nothing to do with it.