Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
Tweet: @theurbanologist the tunnels! I shudder to think of the grimy tweets...
This tweet contains emotions: 
disgust, fear, pessimism, sadness