"Inverted loop cast"
There is another trick you can do with this cast if you make it in the side arm position. With a normal side arm cast it is easy to make the fly "hook" to the left (right hand caster) to place the fly around an obstacle or ahead of the leader. If you make a side arm inverted loop cast and underpower it you can make the fly hook to the right, which I find almost impossible to do in any other way. I can't say that I can do this consistently because I haven't practised enough but I wish I had learned the technique when I was younger, fishing tiny overgrown brooks in the UK.