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: I walked 3.4 miles today, the most I've walked since I got #rhabdo. Going back to work tomorrow.. here's to hoping it goes okay #nervous
This tweet contains emotions: 
anticipation, fear, optimism