A great table hopping effect that can fill a stage. A large note say a £50 (depending on the audiences you work for I suppose!) is secured in a plastic frame and a padlock is snapped shut through the frame. Five keys are shown to the spectators. It is demonstrated that only one of the keys will open the lock. The keys are mixed up in a bag. Four volunteers are given a free choice of key leaving one left for you the magi. They are told that if their key opens the lock and releases the £50 note it will be theirs to keep. Before each volunteer is asked to try his or her key, they are asked if they would like to trade it for the key you are holding. Each person in turn tries their key, unfortunately none of the keys work the lock. The only key left is for the magi, which happens to open the lock. The magi therefore retains the cash.