Ruined Childhood - Zombie Grandpa!

You should see the actual video. Creepy as fuck. He laughs maniacally then his jaw falls off.

It's funny how in that time, things like this were common in kids shows, but now that society has softened, you notice how much dark they look now, Hey Arnold gave me one of the biggest nightmares of my life.
Does anyone remember the Haunted Train episode?