Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: A pessimist is someone who, when opportunity knocks, complains about the noise #mikeshumor
This tweet contains emotions: 
pessimism