Please analyze the tweet "Even death is unreliable. Instead of zero it may be some ghastly hallucination, such as the square root of minus one.  Samuel Beckett" 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".
disgust, fear, pessimism, sadness