The CHECK SWING!

[Gee]

There is really nothing to prepare for as it is an instant thing and happens probably once or twice a game or two.

I call it a strike if the bat breaks the front plane of the plate but that could change depending on where the batter is standing.

The high and low pitches present a problem for the PU but it not that important for the PU to nail it. Your primary job is to call the zone and not the swing. If you miss it you miss it that's why they MAKE you go to your partner on the call of ball. If he can't see it he will just say "he didn't go" and signal safe because he has to call it something. Not a biggie. G.