"Jail-fucking-bait! Jack-fucking-pot!" Kim Fowley's glee over discovering Cherie Currie (Dakota Fanning) isn't justified by The Runaways—the movie is far too tame for something that begins with drops of menstrual blood sizzling on asphalt. It's still worth watching, because Michael Shannon's turn as promotions demon Fowley is the most decadently rock-'n'-roll scene-stealing since Philip Seymour Hoffman played Lester Bangs. He encourages his charges by throwing dried dog turds at them inside his trailer, and offers the immortal stage direction: "Like your boyfriend just fucked your sister in your parents' bed." Like that, yes. R. Academy, Laurelhurst.