Midnight Snack

I decided water was the best thing to drink before going back to bed. I grab a clean cup from the cabinet and put it under the tap.
Drinking the water makes me feel like the moisture in the air is getting thicker and thicker.
I look around and all I see is blackness. The ground beneath me feels like sand. I look up into the air, and the ceiling is gone. In fact, the whole house is gone. I'm at the bottom of the ocean!