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: @charles_gaba No, I am probably the person most likely to completely understand how gobsmacked you were to learn how true that is. #sadly
This tweet contains emotions: 
pessimism, sadness