ok you have to be near a set of stairs with a wall at them, look at the bottom of the stairs and aim for the corner of the wall and then stand a few feet away from it on the stairs and press forward on the analog stick and tap a and b at the same time now u will be floating above the ground now you press down the left analog stick to crouch then push it to the direction of the end then a option will appear at the bottom allowing you to press A to jump out press it but u wont jump out then just keep moving your camera around until u come loose from the wall and wallaaa!!! u can now fast run and shoot at the same time...