the only garfield one that comes to mind is the one with the Haunted House where it scared the bejeebus out of me w a "count the garfields..."-SYKE .. i may have tried others but i have a vivid memory of being petrified by that specific one xD
Update: found the vid of it! It's this one that traumatized me (around 3 minute 30sec mark. Jumscare warning)!!!