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: #Question of the #day: what are some of your #nervous #habits? (biting fingernails, tapping your foot, clenching your teeth...)
This tweet contains emotions: 
fear