Bannertail: The Story of Gray Squirrel S01 E13 Lure of the Mushrooms

Acacio, Banner's rival for the affections of Flappy makes an evil prank. He deceives Banner by feeding him some poisonous hallucinogenic mushrooms. Instantly Banner becomes aggressive and selfish. Flappy is seriously worried about Banner's antisocial behavior and talks to him after he had a terrible hangover.