It is interesting that Gatlin’s arm action at the start mimics Gay’s. He fully extends his arm, leaving him at a mechanical disadvantage while trying to quickly establish the frequency of his cadence. It might not be a big deal, but starts are not the strong suit of either of these guys. You don’t see this sort of indulgent movement from either Bolt and Powell (just a fantastic starter). They both use their arms to quickly establish rhythm. Where they allow for exaggeration is with keeping the feet low over the first couple of driving steps out of the blocks and almost dragging the trailing leg after push-off. Great contrast in technique.