Please analyze the tweet "@AlisonMoyet Knock, knock!\nWho's there?\nA guard\nA guard who?\n...do, do, push pineapple, shake a tree...\n\nI'll shut up now." and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".