THE Jackass pranksters, led by clown extraordinaire Johnny Knoxville (who plays the title role), take their winceinducing brand of tomfoolery to the next level in Bad Grandpa. They hang the usual daredevil stunts and badtaste humour on a gossamer thin narrative that is by turns touchingly sweet and eye-rollingly preposterous.

Knoxville has to take his eight-year-old grandson Billy (Jackson Nicholl) on a road trip to deliver the boy to his estranged father. Gags in the film hit more than they miss, but the relationship between Knoxville and Nicholl is lovely and the youngster scene-steals with aplomb, ad-libbing like a pro.