Where Does Power Come From In The Baseball Swing - Wrist Snap vs. Forward Bend -

It has been assumed for a long time that the pop that great hitters have can be attributed to their ability to snap their wrists at contact.  But the true source of pop is invisible with the naked eye.  To see it, you have to slow down the video of the swing.  When you do, you will see that the great hitters have more "forward bend" of the bat just prior to making contact.  In other words, the bat is actually whipping forward through contact.  In the swings of poorer hitters, the bat doesn't bend forward as much and may even be bending backwards.

In this video, I show you how this works.