The poster and a movie clip for Jackass 3D have gone online. If you’ve seen the first two Jackass movies and/or watched the TV series, you probably already know whether you’re willing to see their hijinks in 3D or not. But if you still need convincing (or just can’t wait to see the film), hit the jump to check out the new poster and the clip (which features a funny stunt that’s briefly gleamed in the trailer). Jackass 3D stars Johnny Knoxville, Bam Margera, Steve-O, Chris Pontius, Ryan Dunn, and Jason Acuña. It opens October 15th.