This was funny, at times emotional (Gromit crying by being replaced!), thrilling, and then hilarious.
It starts with a normal comedic premise, twists into a genre-rich Hitchcockian story of something amiss at home, and closes with an unexpected final set piece that is (successfully) playing off tropes from a much different genre that it hadn't laid down the tracks for.
If you've seen the short, you'll get this pun.
Anyway I was quite glad I plopped on my 5.1 speaker's…