Thanks Dana that is what I told Mark on a different post. Bustos as strong as she is doesn't even approve of this drill.
And for the same reason your curiosity should already be piqued. I really don't care if any of you ever use a heavy bag. It's not that important a tool. What I'd like you to understand is the point it makes about momemtum already having been transferred into whip as opposed to still pushing the bat at contact.