A better way with two cards is, after bringing one card to the top and one to the bottom, to take the pack firmly between your own thumb and fingers, and jerk it upwards. This will cause all the cards to fly towards the ceiling, except the top and bottom ones, in a bunch. Before the cards fall, you make a dash at them, and affect to catch the two chosen cards in the air out from the rest. This is a very finished illusion. The audience, having their eyes upon the pack, do not notice the two cards between the performer's fingers, but the dash at the pack must be made immediately.