The Bear that Wasn't
Frank Tashlin, animator, director, and author of the original book Chuck Jones based this short on, was so upset by Jones' handling of the material that he claims to have never talked with Jones again. It isn't a successful film, and it's actually a hard slog for a short. Some nice layouts and backgrounds at least. Also, if you ever watch it, be prepared to have the theme song stuck in your head for weeks on end.