What a Bunch of Jokers! Stars at Play at Comic-Con

See how Jessica Alba, Chris Hemsworth, Anna Paquin and more went camera-crazy in EW's exclusive photo booth

COBIE SMULDERS

Even solo, the The Avengers: Age of Ultron star is a force to be reckoned with during her Saturday visit to the photo booth, where she wielded her universally menacing weapon-of-choice: a bubble gun.