I second Tommy's comments, Jack's brain works like no one else I know. He can create so much from so little, it's scary.
I had watched several of his online videos and I was a little disappointed to see several which I thought were obviously "Webcam-Only" routines, but boy was I WRONG! I met up with him at the TSD convention last year in Atlanta at which point he blew me away performing the very same routines in person, and they looked BETTER than the webcam versions. The methods he used were completely different than what I had assumed, they were fresh, incredibly creative, and actually worked!
Do NOT miss Jack's one-man issue of Magicana, you won't be sorry.