After working on '' The Marvelous Misadventures of Flapjack '' and '' Adventure Time '' , the network expressed interest in McHale pitching a pilot to themselves , which became the catalyst for '' Garden Wall '' .
After working on '' The Marvelous Misadventures of Flapjack '' and '' Adventure Time '' , the network expressed interest in McHale pitching a pilot . 
 That pilot became the catalyst for '' Garden Wall '' .