[solarbear]

There are three elbow locations, at the side (punch) deep in front (pitch) and behind the shaft (push). A hitter would use punch or push for all types of shots. A hitters motion is a driving right arm to straight through the ball so either elbow position works.
Pitch elbow is a maximum participation late release for swingers.

A short video of this would be valuable. I don't believe I have ever seen anyone demonstrate this.