Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Last night I had a dream that today was Christmas. I woke up screaming because I wasn't ready. #nightmare
This tweet contains emotions: 
fear, pessimism