I've said this for quite some time, when a pitcher is throwing a side session, I'd have Corey stand in there (fully armored) and when the thought process clicks whether the pitch is a strike or a ball, I'd have him call the pitch and have a coach act as the ump. Next, you'd have to chart the pitches to see over an extended period of time, if he is improving at this exercise. This would do 2 things, it would likely carry over and get him to relax more when deciding in that millisecond whether that pitch is a ball or strike. Also, the more pitches he sees in that situation, it would likely improve his batting eye. They might have tried it, but I have never heard of anything like this. I actually did this with the softball team I coached last summer. It was amazing how far off a few of the girls were with their concept of the strike zone was, especially on outside pitches. I think it really helped.