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The first one was, ‘Be able to take a piss by yourself,’ ” says Bale, who played the Caped Crusader in three Batman films, yet struggled for relief in the rubber costume. “I found it to be ridiculously unheroic between takes when I said, ‘Excuse me, I need to pee, could somebody undo me please?’ ”
“Secondly, tell the costume designer to make sure the cowl doesn’t feel like the Joker is sitting on your shoulders every time you try to turn your head. It took three people 20 minutes with tools in order to take that cowl off (my) head,” says Bale.
From Batman News: