If you put a forcefield over the roof of a building, it sort of looks like a hot tub.

OS: In a world of bon-bons, you are a twinkie.
Ahnk: God damn you, I am Count Chocula and you know it.
I'm not spending my anniversary night thumping my head against the wall. - Damalis, on Moderating TRF
Then tell him you want it harder, damnit! - Ahnk, on Damalis