Definitely have to know what you're doing and get through it pure to execute that. I do know the cueball likes to grab off the rails differently on different tables, rails, felt, etc. I've played some places where you're not getting that level of bite off the rails no matter how well you hit it. At the same time those particular rails almost looked like the other extreme where they might bite a little more aggressively than they should. Like they could be playing a little gaffe. But that doesn't take away how fearlessly and accurately he executed.