Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: @RobertWesley3 I'm #mad that my brother is #sad ! Feel better bub!
This tweet contains emotions: 
anger, pessimism, sadness