I got into the sun temple without first using the crystal to help light your way, and subsequently without raising the water level. I used nature form to spring over to the top of the sun temple from where the rhukks are sitting, and used the same trick to get into the huge water bubble and into the tunnel. It was very hard to navigate cause there was no water, so you have to be good at wall jumping. Anyways, I got to the save crystal that sits directly across from the sunworm boss room. If you save there and die or reload your save, you automatically get teleported to the nearest area with water, which happens to be where them indestructable clockwork crabs come out of that tube. It makes it almost impossible to get back outside to a normal save, but I was able to do it after an hour or so of well placed wall jumps and uber vines. I'm sure this is a pretty isolated case, but if I did it, then i'm sure someone else will eventually.
