The one where I'm unconscious. If I'm honest though, on my back with a pillow over my eyes works beautifully!

This requires a bit of explanation, but have you ever been in a functional sensory deprivation chamber? I had an apartment in college where when you went to bed, there was no light coming from outside, courtesy of a very good curtain, the bedroom door let no light in from the rest of the apartment and unless people were screaming or the central air was on, no sound entered the room. It got trippy!

Anybody ever find themselves in a location like that?