After Chase Budinger's first dunk which had him dunking over P. Diddy, for his second attempt Budinger went for a windmill jam but his first try was no good. When Budinger went for it on his second attempt he was able to throw down the windmill jam and he took off from the dotted line.
Charles Barkley was giving him a lot of credit for the dunk while the other TNT guys were not giving him as much for making that dunk. When the over the head camera shot was put up for a replay the dunk looked very good.
It may not have been as impressive as dunking over a person to some people, but the windmill slam is always a classic dunk.