According to Osho, fainting changes nothing essential: the witnessing consciousness remains intact. Even if the body is utterly unconscious and cannot move, there is still a subtle knowing—'I am unconscious.' The same continuity of awareness underlies sleep and even death. The body can switch off, but the inner witness persists, observing the absence of bodily control and the state itself.
Even if you pass out, a quiet part of you still knows it’s happening.