Instructions
Set up a dunk player in the post when you are on defense. Take control of the dunk player, such as Kobe Bryant, and press "Circle" when a shot is taken to set up his post charge.
Switch to a defensive player under the hoop and grab a rebound.
Tap "X" quickly to pass the ball ahead to the dunking player.
Use the left analog stick to run toward the hoop. Run toward the right side of the hoop.
Hold down the "R2" button and spin the right analog stick clockwise as fast as you can. The player will jump into the air and perform a two-handed windmill dunk.