Dirk Nowitzki is putting up a historic performance in the NBA Playoffs this year—using his peculiar-looking jumper to knock down more than 52 percent of the shots that he's taken in the postseason. So, why the F is it so damn effective? The Wall Street Journal's Kevin Clark asked Mavs coach Rick Carlisle, Heat big man Udonis Haslem, and even Mavs little-used role player Brian Cardinal (!) to help him explain it. Good luck to the guys in charge of trying to stop it tonight. [Read "A Shot So Ugly You Can't Stop It" on WSJ]