sentences:  Harry Shearer, however, decided not to participate in the ride supposedly due to scheduling and availability conflicts, so none of his characters have vocal parts and many of them do not appear in the ride at all.In homage to the "Back to the Future" ride that it has replaced, "The Simpsons" Ride's queue video features a brief animated cameo from Doc Brown who is voiced by Christopher Lloyd.In the queue video, several clips from episodes of the show are featured.