Miami ? He was difficult to spot at first, when the semi-tractor trailer with the words “Diesel Power” on the side pulled up to the Miami Heat’s arena.

Then he emerged from the cab, armed with a plastic water cannon and plenty of one-liners. It only could be Shaquille O’Neal.

Subtle as a dunk, O’Neal made a grand entrance Tuesday at a rally welcoming him to Miami. As he shot water into the crowd of several thousand, a red carpet led him up the steps from Biscayne Boulevard to the arena entrance, where he said an even bigger celebration was in the Heat’s future.

“Remember this,” O’Neal told the fans. “I’m going to bring a championship to Miami. I promise.”

The Heat held the rally to welcome the 11-time All-Star six days after acquiring him in a trade that sent three starters to the Los Angeles Lakers.

During a 10-minute ceremony, he received keys to both Miami-Dade County and the city of Miami.

Fans waved signs saying, “Welcome to the love, Shaq.” Behind him, the Heat unveiled a three-story-high sign on the side of the arena that said, “Shaq in Black.”

“I told my wife when I was rolling up, I felt like the president,” he said. O’Neal then hummed “Hail to the Chief.”

His weight is 340 pounds, and he’s hungry. “I’m not angry,” O’Neal said of leaving the Lakers. “But I’m very motivated.”