Samadhi is said to be a fourth kind of consciousness:

It is beyond the states of waking, dreaming and dreamless sleep. Those who have witnessed it as an external phenomenon report that the experience appeared to have fallen into a kind of trance. The hair on the head and body stood erect. The half-closed eyes became fixed. Sometimes there was an astonishing loss of weight, or even levitation of the body from the ground. But these are mere symptoms, and tell us nothing. There is only one way to find out what samadhi is like:

You must have it yourself…