Rumors for years surrounding this film would have it being in 3-D. However, absolutely no trade magazines list the production as being in 3-D (even pre-filming announcements and in-production articles), and according to Grover Crisp, head of the restoration unit at Sony/Columbia, the original negative bears absolutely no markings that would indicate that the film had any 3-D origins. It is speculated, based on several collectors' memories, that the myth started when super8mm editions of the film were labeled with 3-D stickers by accident, around the same time that stickers were being put on the 3-D shorts that Columbia was releasing in that format.
The first animated short film to be rated X by the British Film Board of Censors.