[Dirk comes in. He makes sure to make not much noise, but just a sufficient amount that Dave can pick up where he's moving. He sees his mess of a brother laying on the ground in the dark. He sits down next to him.]

Warm cloth over your forehead and on your eyes and a warm towel or heater on your back and neck. You need to move away from the tank to somewhere soft. We'll muffle noise and light with some sheets or something.

[Or. The closet would work. Dirk is not suggesting that Dave sit in the closet though.]