OK, so there's this papa silverback gorilla just chilling in his enclosure at the San Diego Zoo. All of a sudden, one of his rambunctious kids chucks some dirt right at his face. What would you do?
Based on what I know about gorillas (ahem, Planet of the Apes, Tarzan, King Kong, George of the Jungle), I'd probably expect dad to pummel a good old-fashioned lesson into the little guy. But, surprisingly, he doesn't.