I spent a while shooting late last night, around midnight. It was pretty dark out, the sky was somewhat cloudy. I started shooting in the light of the patio floodlights, and slowly got further and further away. Eventually they went off because I wasn't close enough to trigger the motion sensors.
I had a SGT head in my bow quiver, and started shooting a piece of white ethafoam the size of a quart milk carton, lying in the grass in our large backyard. I was pleasantly surprised at the results. I hit it more often than I missed it, at distances from about 5 yards to 15 yards. It was pretty fun, too. I couldn't see anything -- arrow, bow, or sight window, and could hardly make out the target.
I don't really believe in instinctive shooting, preferring to use the Hill "split vision" aiming method. But that pitch-black practice session was quite enjoyable, and shows how a body learns to point an arrow in the right direction through repetition.