well i can tell u this, i actually sorta did a little control iunno if anyone has ever done its a control to the top and very useful and flourishy you tell the spectator to pick a card and the swing cut and put the card back to the middle and then get a break like the DUC, transfer to thumb break, swing cut a packet to your left hand, use your left hand thumb to swing cut at the break, and now you have two options left drop the packet and then the selected card is at the top, or you can break the pack into two and swivel the bottom packet to the top and then swing it to the rest and then drop or dribble the rest. ill tyr to make a vid of it soon