This is great. I learned this from Mark in person at a lecture over 25 years ago. I use it all the time. IF you don't get it to work the person does not know and you just do an ambitious routine...or something else...But, you have to practice and be open to having it not work while you practice...just remember, the spectator does not know you did not get the force to work so move on to another effect. Try it every time and you will get better.