Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture 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