Shaquille O'Neal (momentarily) came out of retirement on Monday ... and the Big Fella proved he's still got it, knocking down his patented drop step and baby hook before being swarmed by a gymnasium full of kids!
The 52-year-old, 4x NBA MVP surprised a bunch of kids at Pier 36 in New York City earlier today ... where he briefly played one-on-one with George "The Messiah" Papoutsis, an infamous NYC hooper.
Papoutsis started with the ball, and after attempting to shake Shaq, settled for a mid-range jump shot .