Regarding inertia I don't understand your comment. Hit the shot so that the cb stops dead at exactly the right time (contact with ob). This is contact with a sliding cb. Hit the shot again the same way except a little lighter so that forward roll begins before contact. In this situation the cue ball will transfer LESS energy to the ob, not more, because it started with less energy. When the cb regains forward roll after sliding inertia does not increase. Maybe you mean to say something else but it isn't clear. I'm not saying you are wrong it's just that I don't think I know what you are trying to say. To me, if it is still spinning backward then you hit too hard. If it is rolling forward then not hard enough. The only negative with that is that the cue ball might go off line from an off center hit when the stun wears off and the cb starts rolling again.What I was saying was a true to form "kill shot" is meant to maximize stroke power but minimize energy transfer to the OB. For that effect to be at it's maximum, the CB must have zero rotation at the point of contact to the OB. If it's still spinning backward then it's still slowing down. If it's rolling forward, then it's regained inertia.
Yes, I agree that the term "kill" is to describe the effect on the CB.
Question out of pure interest. Assuming a straight on shot, and the OB had to travel a distance so that rolling the CB wasn't an option. If you had to have the CB travel 1" beyond point of contact with an OB. Would you use a forced follow, or attempt a "kill" shot..? Not baiting, just curious... I would force follow.
Regarding the second point I'm afraid of what I could call stun follow, just a bit above center and firm. I prefer to go for a stop shot and then raise the tip just a hair to get the slight follow, like the drag shot. When I try it your way and do it wrong the cb goes forward 3 feet lol. I guess if I practiced it I would get good at it, but I'm not sure if there is an advantage doing it that way or not.