Just look at the demo... as you can see, most of the time the reaction was like, "So what?".
Teaching this as a single effect doesn't really make a whole lot of sense, since it has so little
impact. It needs to be part of a much longer routine with effects that are a whole lot more
interesting than this.
This is a very basic rope effect. By no means am I saying it's not
worth learning... it's just not worth buying as a single effect.