When two unqualified bozos are hired to transfer a rich teen to rehab, their straightforward gig quickly spirals into dangerous mayhem. Macon Blair makes a welcome return to the Sundance Film Festival following his acclaimed U.S. Dramatic Grand Jury Prize winner — I don’t feel at home in this world anymore. (2017) — with this raucous and wildly entertaining descent into madness. Dave Franco and O’Shea Jackson Jr. are perfectly (mis)matched as Mark and Davis, the fumbling circumstantial chaperones in charge of transporting the increasingly psychotic Sheridan (a brilliant Mason Thames). Phenomenal supporting turns from Nicholas Braun, Peter Dinklage, and Kiernan Shipka round out the ensemble cast, each more unexpected and bizarre than the last. Blair treats us to his signature absurdist sense of humor and douses it with gasoline and psychedelics, crafting an uncanny world where the worst intentions net the highest yields and the open road is full of Shitheads.