The latest movie in MTV's 'Jackass' franchise, 'Jackass Presents: Bad Grandpa,' features the usual mess of nut shots and gross-out gags. But this one's a bit different than the three movies that have preceded it; this one actually has a plot. Plus some classic rock from Foghat and Warrant in the trailer.

Foghat's iconic 'Slow Ride' provides the backing music for the first part of the preview, in which we see star Johnny Knoxville made up to look like 86-year-old grandfather Irving Zisman, who's charged with taking grandson Billy on a cross-country road trip (there's your plot). During the journey, high jinks ensue as the pair performs a series of pranks and stunts while hidden cameras catch the reactions of normal people who have no idea what the hell is going on.

One such scenario involves Irving dressing Billy (played by Jackson Nicoll, who was also Knoxville's young co-star in 2012's 'Fun Size') in drag to participate in a girls' beauty pageant. Partway through Billy's stage performance, he starts stripping to Warrant's strip-club staple 'Cherry Pie' as Irving makes it rain.

'Bad Grandpa' opens in theaters nationwide on Oct. 25.