God admitting that "our computers are on the blink" when he explains that he doesn't know what life Garfield was on.
Garfield pretending to think when asked, with a hilarious Aside Glance to the audience
Odie "meowing" when God asks if he's a cat too.
How Garfield lost his first life in Cave Cat: a gargantuan dinosaurian Odie called "Big Bob" tore apart the largest and apparently last tree of the time, and wanted to play fetch with it. Big Bob spat it out onto him and crushed Prehistoric Garfield, with only his saber teeth poking out of it.
Narrator: And so the first and last cave-cat bought the farm for failing to catch a fetched flab tree.
In Cave Cat, Prehistoric Garfield bumped into a caveman's leg, and the caveman yells "Cat!" The narrator says that cat was the caveman word for "Darn it!"
The "decapitation slideshow" by the jester in Court Musician. Particularly the Embarrassing Slide.