--specifically in what is called "absolute samadhi"--there is pure awareness with no content, no experiencer, and no awareness of time, space, or anything else. It is impossible to even describe that state of unity-consciousness because it has no qualities or attributes of any kind. It is not "like" anything else because it is utterly beyond categorization and thought. Prior to entering that state there is an experiencer and experience, but in that state and of that state no description is possible.
