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: @Brennan_PB Backs up what I always thought ... yer all as mad as each other 😂
This tweet contains emotions: 
anger, disgust, joy