Three human men, six plastic arms, and a literal buffet of slapstick fast food jokes were the highlight of last night's "Tonight Show."

Jim Carrey and Jeff Daniels, who were on the show to promote and debut the trailer for upcoming comedy "Dumb and Dumber To," joined Jimmy Fallon in a clip from "Jacob's Patience," which is definitely a real Canadian soap opera and not at all a fake show that Jimmy Fallon invented for the express purpose of getting famous actors to play with mannequin parts on television.

...Yeah, just kidding. Actually, that's exactly what it is.

In this classic scene, Jimmy plays a customer at a burger joint where Jim and Jeff are, respectively, an employee-in-training and an unhinged fast food supervisor. Pro tip: Don't order french fries unless you like them with a bonus side helping of melted mannequin goo.