Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: @Brennan_PB Backs up what I always thought ... yer all as mad as each other 😂
This tweet contains emotions: 
anger, disgust, joy