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