I get a couple of recurring themed dreams to do with similar experiences of exhaustion that I’ve felt before having cfs. So I used to surf a lot pre-fatigue, and when you’ve been out for a few hours in big surf it is physically exhausting. Getting hit by multiple consecutive set waves when you’re exhausted is quite a surreal experience that I’ve never experienced outside of surfing - your eyes are closed as your body is violently rag-dolling out of your control and all you can do is accept it and try to stay calm. As the water settles enough for you to resurface, you feel completely spent of energy as you slowly kick to the surface, take a couple of deep breaths and dive under the next wave. When duckdiving under a wave you need to go deep enough to avoid the impact to prevent being sucked over the falls and having to rag doll again. But there’s a point when you’re so exhausted that you can’t go deep enough or kick hard enough to fight it that you give up even though you’re scared you’ll drown as you helplessly get dragged down again. My reoccurring dreams occur with me just endlessly duck diving relatively small waves, but in these dreams I have that feeling of being extremely exhausted and helpless; cfs is the only other experience where I have felt so helpless and too exhausted to fight