An engineer is out walking in the park and sees a wild-eyed man hitting a strangely painted block of wood with a stick. The engineer's curiosity gets the better of him, so he asks the wild-eyed man, "Why are you hitting that block?"
The wild-eyed man replies with a bit of a crazed smile, "The sound keeps the elephants away."
The engineer, now fully intrigued, digs deeper, "But why? There are no elephants here."
As the wild-eyed man continues to make his noise with renewed vigor, he says, "See! It's working."
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