SQUAT DOWN
Here's how you can rip it out there with a choked grip and a short backswing

When you swing down from the top using only your arms, it's easy to get off plane. The secret to swinging on plane and with power is in your legs. I start my downswing with my lower body, which pulls my arms into action. You can see how I squat from the top (notice how my rear end "sits down" as I begin my downswing in the sequence at right). I feel like I'm pushing my body into the ground, making a strong connection between my feet and the turf. As I do this, my arms fall naturally, with my left arm hanging close to my chest.

SIT AND SPIN
After sitting down, I turn as fast as I can through impact, using the ground as leverage and getting my weight over my left foot. It's a burst of energy at the bottom of my swing, which is why when I lift weights I only do "explosion" exercises, not high-repetition sets. You only need to be fast through impact.