Comic idea credited to a squirrel we saw in a yard the other day, that was growling and spitting and hissing at another squirrel that entirely did not care or even flick an ear. I've never seen a squirrel growl before, and also every time the other squirrel (moseying) got close, the growly squirrel freaked out and skipped out of range. Reminded me a lot of Tail!