Las Vegas Dice - Trickmaster

Two flat metal dice are displayed. One die has the numbers 2 and 5 on it, the other has the numbers 3 and 4. The dice are held in the hand and the 3/4 die is removed and placed in the pocket. Instantly the dice change places! This is repeated in the spectator's hand. Then the trick is exposed revealing an extra "die". This leads to more confusion as the dice once again trade places leaving the spectator totally baffled!