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While chasing a hummingbird, a cat repeatedly antagonizes the sleeping bulldog next door. The dog turns out to be quite creative in heaping punishment upon the hapless cat, indulging in such ritualistic tortures as "The Fence", "The Rainpipe", "The Thinker", "Happy Birthday"--and that most dreaded of all retributions, "The Works" ("Don't do it, in the name of humanity!" ). This hilariously sadistic cartoon was popular enough to warrant a 1951 sequel, Early to Bet; and as a bonus, excerpts from It's Hummer Time later popped up in the 1983 film Twilight Zone--The Movie.