Task: Assess the emotional content of the tweet and classify it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent 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