A old but effective trick, where magician displays 3 different coloured beads linked (threaded) in 2 cords. To make it look impossible, he ties a knot to all the 3 beads with one of the cord & asks the spectator to hold both the ends of the cords. Magician covers the beads with a silk & asks the spectator to call out the colours of the beads, but before he could say anything, magician magically removes all the 3 beads linked in the cords leaving the spectator scratch his head .... how could he do it. Requires no practise. An effective close-up trick.