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: 18' \nMichael Carrick as struck the back of the net much to the delight of under pressure man u fanz and MOU...
This tweet contains emotions: 
sadness