Quote Originally Posted by Uncle Jesse View Post
It looks to me like an expansion of a method I learned to use to get a sink tip line airborne at the first of a cast. I strip the line in almost to the weighted section and make a roll cast to get the line to the surface or above the surface before making my cast to begin a drift.
It is a way to get your fly and line off the water and still load the rod on a roll cast. But the real reason to learn casts such as this is it develops your casting and feel for the line in circumstances when casting is awkward.