First of all:
Lucky guy! I should have vacationed in Tennessee as well :-)

Second:
How can you be so sure he didn't watch some of your videos?
If it was me, I definitely would do some background research, even if it wasn't "my thing", just out of curiosity.
Maybe this gave him the idea with the Tens unit...
... just a little mischievousness :-)

Finally:
I am happy for you!
And thanks for all your enthusiastic and well written contributions to this board!