Had a really weird dream a few nights ago! Or at least a dream with weird side effects...
I first remember being in a cave with this girl, and we were going diving in the cave. Everything had a warm sort of light to it, and the water was crystal clear, so it was visually pretty impressive (as was the girl!) But apparently I didn't have any sort of diving equipment. She was some sort of instructor or guide or something, and we were going to hop in, swim straight down, then forward to another vertical passage to where there's more air. But every time I'd try it, I'd lose sight of her and didn't know where to go, so I'd always retreat back to where I started as I ran out of breath.
Then tiger sharks appeared. In the cave. But it was cool cause they were docile. We called off the diving to come back another day. Then we flashforwarded to that other day, and a guy was with us now. The sharks were back but we ignored them. I still, however, couldn't make the dive properly. I'm pretty sure I was expected to have some sort of SCUBA gear! I made some headway in at least figuring out where I was supposed to go, but alas, the dream ended and I never made it.
The weird side effects part? I'd keep waking up from the dream holding my breath. :p I remember being annoyed by this, because it's not fun waking up entirely out of breath, but I'd immediately drift back off into the same dream.
This is probably how people get sleep apnea!
The other weird part is that despite repeatedly apparently drowning, and despite sharks, the whole dream had a pretty light and fun mood to it. Quite incongruous, but given the subject matter (cave divers are nuts!), that could've easily been nightmare material so I'm glad for it.