Let's All Go to the Lobby (1957)
Let's All Go to the Lobby is a 1953 animated musical snipe played as an advertisement before the beginning of the main film. It featured a family of four talking concession stand products, singing "Let's all go to the lobby to get ourselves a treat" and walking to the concession stand. One shot from the film depicts the anthropomorphic gum, soda, popcorn, and candy walking behind the silhouettes of audience members in the foreground, creating an illusion of depth.