When Uncle Grandpa hosts a funny face party. Mr. Gus asks why he wasn't invited. Uncle Grandpa explains that Mr Gus doesn't find anything funny. Mr. Gus heads to his room but gives a warning about Funny Faces "because they can cause a lot of pain." Uncle Grandpa then makes a face so funny and it comes to life. Uncle Grandpa and the rest go back to their normal day activities.
It goes too far on Pizza Steve, Giant Realistic Flying Tiger, and both Uncle Grandpa and Belly Bag, and they are laughing too much. Uncle Grandpa goes to the closet where Pizza Steve and Giant Realistic Flying Tiger are hiding from the funny face. Pizza Steve says, "I'm starting to get crust bubbles from laughing too much." Giant Realistic Flying Tiger explains that she is losing fur. Uncle Grandpa: "That's terrible, girl. And I don't think my funny bone can take it anymore." The funny face is in the closet too. The three run away and decide to destroy it with army weapons but the weapons blow up.
Uncle Grandpa, Belly Bag, Pizza Steve, and Giant Realistic Flying Tiger head into the living room. "If we don't find a way to destroy that Funny Face soon, we're going to die laughing." Pizza Steve decides to get somebody who is super serious. Uncle Grandpa decides that Mr. Gus needs to destroy the Funny Face. The Funny Face, however, finds them and the get away from it.
They head to the room and lock the door so the funny face won't get in. Uncle Grandpa explains what happened and Mr Gus says, "No. Friends invite friends to their funny face party." The funny face destroys the lock and Pizza Steve and Giant Realistic Flying Tiger hold the door. Uncle Grandpa decides to invite Mr Gus to their "Destroy the Funny Face Party". Uncle Grandpa gives him a rock but refuses. Saying that their friendship is broken, this causes the four to cry. And it destroys the Funny Face after he breaks the door. The funny face is destroyed and a dog eats it.
Mr. Gus says that he is still their friend and explains that the only way to destroy the funny face was to get serious. Pizza Steve suggests that should've been his idea. Uncle Grandpa telling Mr. Gus sorry they wouldn't listen about the warnings for making funny faces. Uncle Grandpa then makes "Cuddle with Mr. Gus Party" thus ending the episode right there.