Foster's Home for Imaginary Friends - Season 6 Episode 12 -

Frankie and Mr. Herriman are hosting an important party in the foyer to raise funds for the house, so Frankie tells Bloo, Wilt, Eduardo, and Coco to either stay upstairs or outside. After a series of ridiculous deciding, they choose to stay upstairs, but after being there for a while, they decide to go outside. Things are going well until Mac comes with video games and they realize they are stuck outside. the situation becomes chaotic as they try to get inside, and ruin things for Mr. Herriman and Frankie.