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: When the lights shut off and it's my turn to settle down, my main concern...
This tweet contains emotions: 
anticipation, optimism, sadness