Sleep physiology is not in the realm of quantum physics. Turns out, when you are asleep your brain is very active. Your "consciousness" is one of the functions of your brain. Typically, when asleep, you do not have conscious functions. ...
As light leaves a star (gravity hole) it loses energy -- is red shifted. Ever wonder if the "Black Holes" are really infrared holes? Maybe the light undergoes a severe red shift. Just a thought.
Sliding friction can often be approximated by F=mu*N. You know mu, you know N (normal force). Sliding friction is almost constant for slow sliding (<<<<<<<<<<c).
Usually, F=mu*Wt frictional force equals some constant (coefficient of friction) times normal (perpendicular) force. Although there are differences between sliding friction and static friction, their correlation is close to 1. That doesn't mean they are equal.
Speculations about events that we cannot yet know about are useful for they tell us where we want to go. And who knows when we will get there. Hmm, I've left physics for philosophy (sorry).