From The Grim Adventures of Billy & Mandy Season 2 Episode 1b: "Tricycle of Terror"
A reference to Shel Silverstein's "Where the Sidewalk Ends"
Billy: I don't care what you do to me, just don't hurt Trykie.
Sperg: Your stupid bike is about to have a little fall.
Billy: No Sperg, no, NO!
Sperg: This is where the sidewalk ends, baby.
Billy: Don't do it.
[Sperg throws Trykie off the edge]
Billy: TRYKIEEE!
Sperg: Wow. That was even more satisfying than I thought.
