S11E22: No Country Club for Old Men
Just don't fucking say anything, okay?
Oh, you know what? Hang on, I left my harmonica in the tub.
I think Peter's in there taking a bath.
PETER: (SCREAMS) Son of a bitch!
What the hell did I just sit on?
Where is it? Where's my harmonica? It's not here!
Peter, have you seen Stewie's harmonica? It was in the tub.
Oh, my God, it was in the tub, and now it's in my butt!