Pitching mechanics: How to transfer your weight more explosively

Here's an excellent example of a pitcher leading with his hip as he expands sideways away from the rubber toward home plate. This of course is Roger Clemens. It's no secret why he throws as hard as he does: He transitions his weight correctly by leading with his hip, which enables him to utilize his strong lower half to transfer energy to his upper half. Notice, too, how he's striding forward with the side of his front foot closed? It will open to a position in which his toes face the catcher when he lands.

Does your stride look like this?