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: You head north and arrive at a breezy cave. It smells sweet. You glance at your watch; you're running 15 minutes late.
This tweet contains emotions: 
joy