I have a couple of things to add. When learning a back roll fear is the biggest obstacle. Most people
start by using the kite very high in the window, and turn away very quickly. This causes more of a butt check back
spin than a roll but you are on your way don't get discouraged, this is a training wheel. Once over the fear, get
comfortable with it. This trick takes repetition. You are wanting to lower the kite and use pop MORE than letting the kite support you on this trick.