Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: @len_snart gives a frustrated growl, before stepping closer and putting his gun through the barrier. No alarms and nothing happened. He-
This tweet contains emotions: 
anger, disgust