Task: Assess the emotional content of the tweet and classify 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 best represent the tweeter's mental state.
Tweet: I've always had a weird grudge against stingrays ever since one killed Steve Irwin.
This tweet contains emotions: 
anger, pessimism, sadness