Here's something you can do with the turnover change (Curry or otherwise).
Take any deck. If you like, make sure the 2nd and 3rd cards from the top contrast well. Let's say they're AS, KH.
Double turnover, showing AS. Turn down and deal this to the table on your left.
Double turnover, showing KH. Turn down and deal this to the table on your right.
Snap your fingers over the KH on your right, then turn it face up, revealing the AS.
As you are doing this, turn over (i.e. switch) the AS on your left, revealing the KH.
The timing of the move, coming just as the switch of the card on the right is revealed, provides excellent cover.
I'm sure this is one of the most obvious applications of this move, but it's really about as clean and straightforward a version of the two card transposition as you'll ever see. If you can do the turnover switch on a spectator's hand you can do the entire thing without a table.