Gut Grinder is the 26th episode of Adventure Time and the Season Finale of Season 1. It first aired on September 27, 2010.
Finn and Jake find out about a monster called The Gut Grinder. But Jake begins to think he is "The Gut Grinder" because all of its traces match Jake's appearance. This leads to Jake really thinking he is a monster, and disaster happens.
- It is shown that Finn is bad at playing Viola.