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Shaquille O'Neal just dropped a huge surprise on the Florida Basketball Cop and the kids he shot hoops with in a viral video ... showing up to the department and playing some street ball.

Shaq arrived at the Gainesville Police Department Saturday and headed out to the same spot Officer Bobby White responded to a call last week which ended in a game of pick-up ball with local kids. It's pretty awesome, you can tell how pumped both the kids and the officers are to play with the big man.

Lucky for everyone involved, Shaq was more of a facilitator during the game, dishing out passes instead of dunks.

The game ended with a great message from Shaq to the kids ... proving once again why he's the man.