Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
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