I was at a game recently when the opposing pitcher performed a certian movement everytime he can set:
Right before he brought his hands together to the set position, he would lift his back foot.(think of lifting your back foot to start your coming set motion) It varied from a very noticable lift of a couple of inches, to more of a weight shift and a resetting of the foot.
I though that if this would have been a key game I'd been letting the umps know and to watch it. At the very least he was breaking contact every time he came set.
What I see is that every time he lifted his back foot, the runners would begin shifting their weight to go back to the bag.
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