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: Just waved daughter and her wee friend off to school, walking by themselves #sob #terrifying!
This tweet contains emotions: 
fear, sadness