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When in China, beware of benches
Chinese park officials are going to teach their visitors good manners with the help of steel spikes inserted in benches.
Inspired by an art installation by a German artist, they fitted park benches with retractable steel spikes that hide when a coin is inserted and shoot up when the paid time is over. The officials claim that their invention cannot cause any serious harm – however, just in case, they made the benches beep out loud when the sitting time is about to expire.