funny you bring those two together, sleep and water ( I imagine cold water)... I think the biofield expands in those cases, although (at least for me) not volutarily
did you ever bathe in really really cold water? When you get out of it, and it is in the winter and air is cold aswell, you have a hard time drying your skin.. because it feels to be at least 2cm higher than it really is. It is strange, but I think it shows the being there of other experience-realms than only one... I am sry, it it hard to phrase as a non natural english speaker. Do you understand?