Halloween Hall o' Fame (1977)

Jonathan Winters stars as a night watchman working late at Walt Disney Studios on Halloween night. He is accompanied by his dog, Peanuts. The night watchman, bitter about working on Halloween night, stumbles upon the prop room at the studio and begins acting out scenes with various props. Eventually, he finds a crystal ball containing a talking Jack-o'-lantern (also played by Winters). Jack-o'-lantern is hiding out from Halloween because it's no longer scary like it was back in "the olden days".