That's a great concept and that's what the whole one plane vs two plane, east-west vs north south thing is all about. But in reality if you study hitting you see that it doesn't stand up. Here is a video with some great shots of Trout, how many horizontal, east-west, swings do you see?For me it’s not as much about the one plane versus two planes, as it is about the direction of the plane. For all practical purposes, the barrel has more surface area in the horizontal plane, so vertical movement has less of a chance of hitting it than horizontal movement.