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: @united horrible service. EWR. Not a cloud in the sky. Normal departure at 10am now leaving at 5pm. Crappy #UnitedAirlines
This tweet contains emotions: 
anger, disgust