Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
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