MOST of the tricks along this line use only one spectator and the performer. Now it is possible to use two spectators for a double effect. Two ordinary packs are needed. The working will suffice to make clear the effect itself. Hand one pack to one person and have him shuffle. As he finishes this, hand the second pack to the other person to mix also. While he shuffles, take back the first pack and give it a further mixing while obviously waiting for the second person to finish. You note both the top and bottom cards of your pack. It is easy to merely note the bottom card, shuffle it overhand to the top and note the new bottom card. Now take the pack from the second person and place your 'keyed' pack in his hands. Ask the first person to cut off about half the pack and hold it. At this time, the two spectators each have half a pack and you have a full pack. You know the top card of the first person's cards and the bottom one of the second person's. Tell them to do exactly as you do. Look at the first person. Take a card from the center of your pack and look at it. He does the same. Put it on top and cut the pack. He does likewise. Now look at the second person and repeat the procedure. Now have them put the two halves together and cut once more. Take the pack from them and at the same time handing the first man your pack. Tell him to run through it and remove the card he looked at. He does so and hands the rest of the pack to the second person, he looks them over and removes his card too. You fan your pack and remark that at the same time you'll take out the two cards you picked by chance. Lay your pack aside and hold the two cards with the backs out. The first man turns his card so all can see. You turn one of your cards, it is the same. The second man turns his card. Your remaining card matches. Remembering the two key cards your task has been but a pleasure. When you run through the pack they have looked at and handled, you have only to remove the card to the left (or above) the known top card, which is that looked at by the first person, and the card to the right (or below) the known bottom card. This double bit of business will upset a few at least and make for a much better effect on the whole.