2:30pm. Didn't even hope to wake up. The exhaustion had indeed been very pleasing. I could even describe as close to orgasmic. But only as long as I didn't try to stop the tension. When I tried to finally have a sleep -- as in, get into bed (not a chair) and relax the muscles (opposed to sitting in a fixed position with a laptop) -- my entire body started aching. Terrible pain in my back and neck. Spasms in my legs, one after the other. Tried to walk to the shower, but these spasms. Just couldn't find a place for myself. It's similar to what happens when you get a really bad cold, I think.
So, that was interesting experience, but I don't think I'm going to do that again.