In this episode, Peter and Brian are on a road trip to Europe, but Meg is left behind. She is upset about this and starts eating ice cream. Peter, who is watching from the kitchen, sees Meg eating and decides to scare her. He puts a gun on the table and waits for her to come in. When Meg walks in, Peter pretends to be surprised and says, "Oh, hey, honey. Did you, uh, hear that?" He then points the gun at her.
Meg is clearly terrified, but Peter just laughs and says, "Just kidding, honey! It's a rubber chicken! I'm so good at this!"
However, Meg is not amused and storms off.