Determine the emotional tone of the following 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.". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".