Your dream is rich with symbolism and themes that may reflect your current feelings and experiences. Here's an interpretation based on the various elements you've described:

1. Waterfall: Waterfalls often symbolize the flow of emotions and the power of nature. In your dream, the waterfall could represent an overwhelming situation or emotions in your life. It might suggest that you are facing challenges that feel powerful and potentially risky.
2. Kayaking and Swimming: Jasmyn being in a kayak while you swim may reflect your different approaches to navigating life's challenges. While she appears to be in control (navigating the kayak), you are more vulnerable, represented by your swimming. This dynamic could indicate how you view your relationship with Jasmyn or your own feelings of control versus vulnerability.
3. The Near Fall: Your near fall into the waterfall suggests a fear of losing control or being swept away by circumstances. However, your calm reaction—saying you can "just restart the game"—indicates a level of resilience and adaptability. This may reveal your ability to cope with setbacks and your understanding that life has its ups and downs.
4. Dropping Your Phone: Phones often represent communication and connection in dreams. Losing your phone could symbolize a fear of losing touch with important aspects of your life or feeling disconnected from others. Hampton retrieving your phone for you may signify the support you have from friends or loved ones in times of need.
5. Men's Locker Room: The locker room setting might represent a space of vulnerability and transition, where people share stories and experiences. It can symbolize a desire to connect with others about your experiences. The interruption by the random guy could reflect societal norms regarding humor and how people cope with serious topics, possibly highlighting discomfort with discussing vulnerability.

Overall, your dream may reflect themes of navigating emotional challenges, the importance of support from friends, and the balance between vulnerability and resilience. Consider reflecting on your current life circumstances to identify if there are situations that resonate with these themes.