Start with a line wrapped under the trailing edge and running around the tip and back over the leading edge. You also need to have the kite balancing on the opposite tip, leaving the wrapped tip in the air. Push the wrapped tip forward, flattening the kite out almost onto its belly (nose away from you). As the kite almost touches the ground, pop the wrapped tip HARD, and immediately drop your hands (crouch down, even). The kite 540 Flat Spins and in the process (if you dropped the lines down low enough), unwraps the tip wrap. Very flat and very fast Flat Spins are possible. You can also let the kite lie down flat on the ground (belly down, nose away) before popping the Twisted Sister, but it occasionally leads to ground snags. If you don't get the pop just right, you can still get a 180 Flat spin. This is called the "Half Sister" for obvious reasons. This trick has some resemblance with the G-Whizz.