This is a very sweet routine. There is a lot of room for interaction and ad lib with your audience.
There are 2 methods, but i really love the harder one. Very little set up need and can be done again
immediately. I only gave 4 stars because I think there could have been a clearer way to explain the
math for the harder method. I had to watch the video a few time before i really got it. This does
take some mental math skill so it is not for everyone, but i love it and use it a lot now.