Fly the kite up and throw hands forward at 75 % to kill the kite onto it's back. Now give a fast sharp tug on both lines, followed by a little slack, to recover the kite up and pull the nose towards you and down until pointing towards the ground. The back of the kite should be facing you with the lines running down and coming under the leading edge.
At the point when the nose drops down and makes contact with the lines across the leading edge, give a firm and fairly steady pull on one line. The force of the nose traveling down when contacting a now tight line on which pressure is being applied, causes the free wing to continue to travel away from you, inducing the kite to twist laterally and roll around the spine. The kite should continue to fly downwards during the twist and further rolls can be introduced by coaxing the lines alternately in sync with the kites rotation.