It is possible to play a legal follow shot in that position, but you have to have a knowledgeable ref. The easy way to avoid a foul call is to stop the cue ball dead on contact with the object ball or even draw it back a little without any penetration into the space of the object ball. It is a good shot to practice...., 8 ball slightly less than a cube of chalk away from cue ball. Straight in shot, I made the 8 but cue ball rolled too far forward. ...