This could probably be a subject of research for Dr. Dave, because I couldn't seem to find any info on it. Say I'm playing 8 ball and my opponent's ball is a hanger and is blocking the pocket and I hit my ball into it to clear the way, but I still want to continue my run by having my ball follow it right into the pocket. When making combination shots, what circumstances do you need to have, or notice that makes both the balls go in?