The mid nineteen-fifties was the beginning of the downside of the Warner Bros./Merrie Melodies cartoons. However "What's Opera Doc?" (released in 1957 and directed with the genius of Chuck Jones) could be considered one of the best ever produced by WB. Folding Wagner into the eternal struggle between Elmer Fudd and Bugs Bunny makes it surreal and hysterical. (An odd combination at best.) If you have never seen this, waste no time and do so.