Origin Story: I'm Sorry, Jim

https://en.wikipedia.org/wiki/Garfield:_His_9_Lives

"Primal Self" (written by Jim Davis; illustrated by Jim Clements, Gary Barker, and Larry Fentz): An orange housecat (by the name of Tigger) meets an ancient, primal, dangerous, possibly evil force, causing him to revert to an entirely feral state. The story ends with him preparing to attack his unsuspecting owner, an elderly woman; it is strongly suggested that he kills his owner afterwards. Garfield is shown to be terrified of the events in this life; he is depicted cowering under a blanket in his commentary on it, remarking that this life taught him that there are elements in a cat that are not to be toyed with.

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