Instructions
Select the appropriate person to make the dunk. The only people who can do this are Jason Richardson of the Orlando Magic, Russell Westbrook of the Oklahoma City Thunder, J.R. Smith of the Denver Nuggets, Anthony Randolph of the Minnesota Timberwolves and Josh Smith of the Atlanta Hawks.
Hold down the "R2" button when the right player has the ball. This lets you sprint toward your basket.
Spin the right analog stick 360 degrees clockwise as fast as possible. If timed properly, the player will leap to the basket in a 360 degree motion, dunking the ball into the basket.