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: @Senpai_Vanilla This would be the height of hilarity, were it not for the fact that the adult swan is highly likely to attack.
This tweet contains emotions: 
joy