1. This is the most underrated 360 of the four. Once you learn the first backside 180, for the second half of the move just move the handle hard across your body and pass it as soon as possible. When you pass the handle, move it hard back toward the wake to turn your body in to the toeside edging position.
2. It helps many riders to pass the handle under their butt as opposed to high at the small of their back. Doing this helps you set the axis and ensures the first handle pass.