“To get ready for action sequences . . . it’s kind of random,” Vanessa Hudgens told justjaredjr.buzznet.com, apropos of nothing much, save her forthcoming movie Sucker Punch. “We’d take our guns and do jumping jacks with them. We’d be like [breathing, mimicking jumping jacks] and then we’d be in for the kill.” In a wide-ranging interview touching on semiotics and “stopping power,” Ms. Hudgens went on to say . . . uh . . .