It’s the ocean depths, not the surface of the sun.

Gas is compressible. So if you stepped into the water without any protection at extreme depth, every gas-containing part of your body would be crushed. That includes your nose, mouth, ears, throat, lungs, bowels, and most of the bones of your face.

Liquids are not very compressible. So the liquid parts of your body, like your eyes, brains, blood, and limbs, would not be affected very much. Maybe they would shrink almost imperceptibly. The same is true of the bones not in your face.

The final result would be a an oddly-smushed looking corpse, not a cloud of vapor.

Incidentally, this is why deep sea divers can swim at depth. They breathe very high pressure gas into their gas-containing parts, which thus remain inflated despite the pressure of the water.