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: Note to self ~ Stop laughing at things that offend you, it's ok to get mad at people \n #NoteToSelf  #mad #upset
This tweet contains emotions: 
anger, sadness