view-source:http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc6/268652_201363499916292_100001279310686_649304_1639431_n.jpg -  http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc6/268652_201363 499916292_100001279310686_649304_1639431_n.jp  ">

could straighten out that arm a bit, but my chin is on my shoulder and I'm up on my toes.

now, when I absolutely GO for it, REALLY drive the fork down to the check point in front of my left foot 
with a big push from my upper (right) arm, what happens is that when I start coming up, I blow the fork 
clean out of my left hand. KAPOW...Bag goes sailing off into the distance off to my left.  I did this twice
yesterday when I was going balls out for 25 feet.

I suspect that driving DOWN that hard has little point to it, after all the goal of the event is to heave 
the bag UP, not DOWN, and if I'm going to drive to the ragged edge of control it should be UP, not down...

BUT

WTH do I know?  Comments and suggestions?

Alan, faster down = faster hand speed up. Usually when you go all out your form falls apart, not you inparticular but Todd and myself. I am unable to view the pictures but were you driving to the checkpoint on the inside of your right foot and almost sweeping the ground with the bag, driving hard with your right hip moving forward. Arms long. The point of burying your chin into your shoulder is for a high backswing that equates to a faster downward drive. Like Myles said the bag should be ripping as you transition from fast dive to the pull.

hope you get something out of this.

Left arm:

Just like the hammer, you need to stay long to mximize and hold the greatest circumfrence through out the pull when coming off the back swing maximizing velocity. To do this the left arm must stay straight at all times. If you bend your left arm just before the release you shorten the circumference and slow the velocity just like short arming the hammer. Look at your left elbow when you are in the starting position. It should point behind you, not out to the side like a gorilla. When the elbow is pointed behind you throughout the entire throw it prevents the left arm from bending thereby keeping it straight. Think of the left arm as a straight line or the hand of a clock.  Concentrate more on driving with the right arm but keep the left straight. Duct tape a PVC pipe to your arm if you have too to keep the arm locked.

Grip:

I'm 6'-5" and hold the fork about 36" hand to hand. Too wide a grip, you limit the back swing, too short a grip you lose leverage. Find your own sweet spot.

Back swing:

At full back swing, my left arm is parallel to the ground and straight, my right forearm is vertical and my bicept is parallel to the ground (right arm bent at a 90). Shoulders are vertical, and hips horizontal to the ground cranking the torso like a spring. ( lotts of explosion here) To get cranked back that far I don't do that rocking back and forth thing, I just start by holding the bag up high with the left arm and let it swing back like a pendulum so the weight of the bag cranks my torso maximizing the back swing more than I could ever do without the assistance of the bag. 

Not for nothin, I hit a 29 PR, got the height for 30-31 but keep front ending the bar. I throw a near straight up shot about 80 degrees taking 1.5 steps in font of the bar and standing with feet at a 45 degree offset from parallel.    

Hope this helps  

Alan,

If you have face book, go to this site and you can see what I mean.

https://www.facebook.com/home.php?sk=group_50064698215&ap=1 - https://www.facebook.com/home.php?sk=group_50064698215&a p=1