Examine 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 determine which of these emotions are present: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If there are no identifiable emotions, reply with "neutral or no emotion".