The Jackass films are so nakedly designed to provoke that many critics reflexively pooh-pooh them, when at their core these ribald stunt flicks say something about the inherently human (or is it just masculine?) appreciation of prankish absurdity. And the creative stagings on display in the new trailer for Jackass 3D certainly deliver: fish slaps, porta-potty launches, and a human "duck shoot." Sign me up.