Knock knock jokes: epic fail

Magnus: "Knock knock!"
Me: "Who's there?"
Magnus: "Me! Ha ha!"

Magnus: "Knock knock!"
Me: "Who's there?"
Magnus: "Banana!"
Me: "Banana who?"
Magnus: "Banana banana banana banana! Ha ha! Banana banana! Knock knock!"

Magnus: "Knock knock!"
(Pause) Me: "Who's there?"
Magnus: "Magnus."
Me: "Magnus who?"
Magnus: "Open the door, it's me Magnus! Let me tell you another knock knock joke!"