Dust off that bulletproof vest and re-charge your batteries: Johnny Knoxville is hitting home shores this week! The fire-starting (literally) stuntman will be here on Thursday for the premiere of Jackass Presents: Bad Grandpa in Sydney. The film just opened at no less than number 1 at the U.S. box office, and we have a sneaky behind-the-scenes clip from the film that details what, exactly, goes into a ‘Window Launch’. You’ll see.

Jackass Presents: Bad Grandpa airs in cinemas nationally from November 14.