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: @theurbanologist the tunnels! I shudder to think of the grimy tweets...
This tweet contains emotions: 
disgust, fear, pessimism, sadness