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: If yiu don't respond .o an email within 7 days, you willxbe killed by an animated gif of the girl froa The Ri.g.
This tweet contains emotions: 
anger