Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: How come quiet well behaved cats and dogs have to ride on a plane in a tiny bag while screaming small humans roam free? #outrage #teampet
This tweet contains emotions: 
anger, disgust