Yes he said something to the effect of " Homer and I will take the secret to this to our graves. It can be done with borrowed coins, any time anywhere just aks us. "
Pretty much you can figure it out if you look at enough material on the effect and are diligent in practice. I have not heard of either of them teachingit to anyone.
I think it is an awesome routine and have seen it several times in person. First time I saw it my jaw dropped. Second time everyone in the room at Magi-fest had a moment of astonishment. It was just as cool as the first time each time I saw it.
Snorri