Much like its cousin, the baseball cap, the baseball bat seems pretty simple, at first glance. Take a reasonably cylindrical piece of wood, taper it as necessary, put a little nub on the end so your hands don't slip off, and swing. Hit the ball too low, and you'll pop it up.
Perhaps you've seen "Ultimate Batting Practice" around this week; it's a full fledged viral video now. You'll recognize it by the egregious sodomy of physics, and the prominently-displayed dual Easton logos. It's a "dude" making magic with four pitchback rebounders, and that's all the info that comes with it.