Hey Mark,
Great performance – really enjoyed it. Spending the time at the start explaining the impossibility of a coincidence goes a good way to reinforcing the impact of that effect.
A few scripting subtleties that might be worth thinking about. When they do stop the deal, perhaps don’t ask too much about “this card or that card” because at this point that cards don’t matter, it’s the pile size. So perhaps ask “are you happy with the size of this pile? or would you like a few more cards” etc.
The pacing is nice, the shuffle at the start is so unimportant you should try not to look at your hands during that.
Thanks for sharing! Keep up the practice!