The prog on the BBC website
 OK how many different types of cards are involved in this trick 10, 20, 8 maybe?
... NO there are only 2
i.e.  the targets : "the poker cards" AND  all the other cards
(..and it's a question of placing these 2 types in different postions & we hide this position in an odd/even pattern)
 Now we end the trick with the targets facing up and the others facing down .. just as if we had gone thru the pack and tuned them over
 but we didn't exactly do that did we ? Cos as the penultimate part of the trick we'd dealt the cards into 2 stacks and then turned one stack over
 So we want targets to be facedown on the first stack and face up on the second stack
 ie. in the original pack the targets face DOWN if odd and UP if even
 but the magician asked the guy about each pair "flip or not" ..so what ? that made no difference. If a target was an odd it would have been facing down, but flipped it becomes an even, so it stays in the "right" position anyway
 Now when we deal the cards into 2 stacks the first stack has "targets" facing down and second stack has them facing up. Flip the second stack add it too the first & voila all the targets are in face down position.
 A way of simplifying the trick is to forget about the poker hand and just think about red or black ... Begin the trick, for odd cards flip if red, for even cards (i.e. 2nd, 4th, etc.) flip if black
 when you deal it into 2 stacks reds will all be facing down in the first stack and up in the second. Flip the second stack and add to the first and in the whole pile reds will be facing down.
 The talk of a poker hand is a standard conjurer con, to make the trick seem very complex ..when in fact the trick is schoolboy simple.. "The poker cards" are just 5 cards different to the others ..it's not like you make them come out in any specific order or anything.
 A complex maths explanation is just not necessary, cos there is no complicated arrangement, you've just hidden the flipping inside the odd/even pattern.
 Development  We could now develop a much more complex trick by hiding the arrangement in a triple or 5 card pattern instead of the just the double odd/even pattern.
