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Demonick Nati, a publicist in Los Angeles, went to an event and met Shaquille "Shaq" O'Neal, who you might know from the Comedy Central Roast of Justin Bieber and also the NBA. While the program's rules said no cell phone photography, Nati snuck a picture. Or so he thought.

The video got over 10,000 retweets in 16 hours, and Shaq's playful grimace is already the stuff of legend.

Can't go behind Shaq's back.
Can't go behind Shaq's back.