On the safe door he was very pleased to find a note reading: "Please don't use dynamite. The safe is not locked. Just turn the knob."
He did so. Instantly a heavy sandbag fell on him, the entire premises were floodlighted, and alarms started clanging.
As the police carried him out on a stretcher, he was heard moaning: "My confidence in human nature has been rudely shaken."
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