I love this. I tried this while trying out my new 50' lines, and it worked great. Snap the brake lines and the kite starts to glide away. I could keep a little tension on the brakes to get maximum glide and steer a bit. With the lousy wind (0-5mph) it really helped. I ran back 50 yards at one point, and with 50 foot lines, that was quite a glide!
A good way to practice this - put marks on the sand (if on the beach) or in some way mark the beginning and ending points you want to be in between!! Start at the forward mark, back up as needed til you hit the backwards mark, then "recycle" the ground between your marks!! Doesn't take long to stay within a pretty small area to fly!!