Jackass, June 26 -- At some point in the editing of Jackass: Best and Last, Johnny Knoxville got emotional. Not in the manner one might expect from a man who has been bitten by a full-sized alligator, launched headfirst from a rental car, and set on fire for pay. He got emotional in the way people do when something they built is ending. The film contains a sequence in which the cast watches footage from the franchise's earliest years, a generation of now-middle-aged men looking at versions of themselves doing things their bodies can no longer absorb the same way. Knoxville, 55, reportedly fought back tears in the edit suite. It does not appear to have been planned.

Best and Last opened Friday at 2,800 theaters nationwide to the highest c...