Well, I still try this almost everynight, and this one I almost had success. The problem was some bird outside, and random cars passing by on the road next to me (it was around 6.30am while trying this).

I imagined myself claping my hands, and suddenly I could feel my hands touching each other. It was all dark, and I could still hear the bird, and one car that passed by, but I was there rubbing my hands. Tried to look at them but I could only see some white-ish shadow, just as if they were somehow outlined in the dark. I tried to open my eyes using them, but nothing. I relaxed while still claping, but I guess outside noises were too much ...

Gotta try this again on the weekend with my ear plugs...