In regards to IP/IS I was an extreme skeptic. After spending a weekend training with Mr. Popkin I readily admit I was completely wrong. If you have an opportunity to train with him or Joe Brogna, run, don't walk. He had great things to say about Dan Harden as well.
come on! he couldn't have known about those stuffs. he spent most of his time fishing, and not even good at it! everyone knows that fishing involved the use of explosive http://www.youtube.com/watch?v=QSEuD...eature=related
therefore, his knowledge of IP/IS is suspect