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: @RossKemp Omg that is just horrific. Something needs to be done. 😢
This tweet contains emotions: 
disgust, fear, pessimism, sadness