Harry Houdini, the famed escape artist issued a challenge wherever he went. He could be locked in any jail cell in the country, he claimed, and set himself free quickly and easily. Always he kep his promise, but one time something went wrong. Houdini entered the jail in his street clothes; the heavy, metal doors clanged shut behind him. He took from his belt a concealed piece of metal, strong and flexible. He set to work immediately, but something seemed to be unusual about this lock. For 30 minutes he worked and got nowhere. An hour passed, and still he had not opened the door. By now he was bathed in sweat and panting in exasperation, but he still could not pick the lock. Finally, after laboring for 2 hours, Harry Houdini collapsed in frustration
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