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: @GNRailUK There's gonna be street parties when you lot leave. Spontaneous rejoicing. Clowns.
This tweet contains emotions: 
disgust, joy, optimism