Mondo Daytona (aka Weekend Rebellion, aka Get Down Grand Funk) is a classic example of exploitation economics, courtesy adults-only producer Barry Mahon (The Beast That Killed Women, P.P.S. Prostitutes Protection Society). Mahon took director Frank Willard's innocuous 1968 Florida Spring Break documentary Mondo Daytona, added some psychedelic animation to appeal to "hipper" audiences, and redubbed it Weekend Rebellion. Two years later, he inserted "live" performances by the Grand Funk Railroad, and reissued the film as Get Down Grand Funk (and added his name as co-director). The problem with both revamped versions is that the new footage, featuring solarization effects and the long-haired, sweat-slicked Grand Funk, clashes mightily with the rest of the film, which has clean-cut, well-groomed college students frolicking and riding dune buggys at Daytona Beach. But did Mahon care? Probably not.
At any rate, all three versions are amusing time capsules, with plenty of '60s-era cheesecake on display. And for pop music fans, there are performances by the Tams ("What Kind of Fool," "Laugh It Off"), Mike Sharp ("Spooky," "Breakthrough"), the Swinging Medallions ("Double Shot of My Baby's Love," of course), and narrator Billie Joe Royal ("Down in the Boondocks") backed by the Movers. Grand Funk fans should realize that the group's contributions are relegated to just two songs ("Paranoid" and "Into the Sun"). Running times vary from version to version; Get Down Grand Funk runs 82 minutes, while Weekend Rebellion is 85 minutes long. Get Down Grand Funk played theaters with Mahon's other Florida-lensed rock title, the curious Musical Mutiny (1970), which featured Iron Butterfly.