I think I understand what he is doing with the stop drills. Holding up (stopping) the bottom hand will snap the barrel. Their on deck routines seem to support this. As you know from long ago, I also use these type drills, calling them hitters box drills. It works to get rid of push, but as aside effect, that front arm can get tied up.
TRANSLATION:

It can't be what it is. It isn't what it looks like.....even though it is....

That would be what HI.com teaches.