Task: Analyze the tweet's emotional connotations and classify 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 best portray the tweeter's mental state.
Tweet: He's mixing it up pretty well..using that slider pretty affective so far #thebabybombers #yankees #offense
This tweet contains emotions: 
joy