I actually think this is hilarious. Brad Pitt entertained his fellow cast members while filming Babel by giving himself a wedgie and walking around like a duck. Cate Blanchett named the act “Hungry Bum” because it’s “when your bum’s so hungry it’s trying to eat your pants.”
In an interview in Entertainment Weekly’s Oct. 30 issue, the 42-year-old actor says he amused himself and his colleagues by yanking up his pants to give himself a wedgie, sticking out his rear and waddling about like a duck. “Throughout the movie, I’d walk around like this,” he says. “You’ve gotta find things to make you laugh during the shoot,” he adds. “Cate (Blanchett) called it the Hungry Bum.” He explains: “When your bum’s so hungry it’s trying to eat your pants.” (source)
