"First, there is a seeming suspension of time. You are not aware of time in the sense of marking time. Second, you pay no attention to spoken words. You may hear the sounds of speech, but you do not decode the sounds into meaningful words. If someone speaks to you, it seems as though it would take a great effort to cross back, think again in words, and answer. Furthermore, whatever you are doing seems immensely interesting. You are attentive and concentrated and feel “at one” with the thing you are concentrating on. You feel energized but calm, active without anxiety. You feel self-confident and capable of doing the task at hand. Your thinking is not in words but in images and, particularly while drawing, your thinking is “locked on” to the object you are perceiving. The state is very pleasurable. On leaving it, you do not feel tired, but refreshed."
Betty Edwards describing R-mode in her book, Drawing On The Right Side Of The Brain