Sorry. Let me ask differently.
What can you accomplish with this principle?
In it's simplest terms its a way of stacking a deck so that it can be fairly riffle shuffled by a spectator yet still maintain some a level of order with regards to card values and colours.
As a suggested routine, take two royal flushes, and riffle shuffle them together. Deal a card from the deck onto the table. Divvy the pile in two, see if the spectator can guess who has the higher hand. Whichever he picks, he'll be wrong, it should be a tie, both with the royal flush.
When you flip over the card on the table, it can be a joker with the word "Tie" written on it.