At the Florida shorebreak, the boy surveyed the Atlantic Ocean as it punched land.
He calculated the sizes and shapes of the undulating waves, analyzed the angles and directions as they arrived and deciphered what he believed was a language meant just for him.
"I felt like I was interacting with the waves," Kelly Slater says, "and they were interacting with me."
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About a decade later, the 15-year-old danced with the Pacific Ocean off Hawaii, and other surfers saw how he read the water in ways they could not, as if he were plugged into its energy and had uncovered secret rhythms.
"He had a connection with the way the ocean moved that was light-years beyond his peers," says Chris Malloy, Slater's longtime friend.
Now 40, Slater is still beyond his peers and his legend has moved to the discussion of "Greatest Athlete Ever." Crunching the numbers, it's an argument that holds water.
"If nothing else, it's an interesting debate," Slater says, shrugging.
It is not just that the Cocoa Beach, Fla., native has a record 49 Assn. of Surfing Professionals Elite Tour wins — he's shooting for No. 50 this week at the Nike U.S. Open of Surfing in Huntington Beach — or that he has 11 world titles while the next closest in surfing, Mark Richards, has four.
It's something beyond wins and titles. It is time.
Slater has been the Everest of his sport for most of two decades. No athlete — not Jordan, Gretzky, Ali, Pele, Nicklaus, Tiger, not Phelps — has been that dominant for so long.
Slater is the youngest surfer to win a world title — at 20, in 1992 — and the oldest — 39, achieved last year. This year, he stands No. 2 on the ASP World Tour behind Mick Fanning, with title No. 12 within reach.
Slater says he's not concerned with legacy, and that unconquered goals are not what's standing between him and retirement. Though notoriously competitive, Slater says he's more calm and at peace than ever, that he's not as attached to the outcome as he was years ago.
Instead, he's just out there in the blue, sculpting waves into works of art in a place that helped rescue him whenever his world crumbled to pieces.
"The water was his security blanket. That was where he felt safe."
Slater's mother, Judy
Slater's father, Steve, owned a bait-and-tackle shop, worked in construction and was an unpredictable alcoholic. "He wasn't violent or mean in any way," Judy says. "He was just scary."
In his autobiography, "Pipe Dreams," Slater wrote that his mother would scream at his father for hours until he'd finally pass out. The two divorced when Slater was 11, and he found solace in the sea.
"He could just unload his problems in the water," Judy says.
Those days seem distant for Slater, who owns houses in Hawaii, California, Florida and Australia, has been valued at about $20 million, and dated Pamela Anderson and Gisele Bundchen. But he spent much of his childhood in poverty.
His mother worked as a bartender, waitress, maid, firefighter and emergency medical technician, and cleaned construction sites to make ends meet. At night, she cashed in coins for dollar bills so that her three sons — Stephen, Kelly and Sean, the oldest — felt more secure when she gave them money.
"It was hard when we were younger," Sean says. "We didn't know it, but it was."
Slater yearned for stability in his personal life. The sport helped, providing him surfing "families" in hot spots across the globe. Slater needed a way to channel his anger and the sport helped with that too.
For example, after an appearance on "Baywatch," Slater heard snarky comments from other surfers. So he narrowed his piercing jade eyes and crushed them in competition.
"It felt like I really had something to prove for a long time," he says.
Slater used slights — real or manufactured — as his fuel and would concoct scenarios in which he cast himself as the underdog, or a man with everything to lose, even as he collected world titles in succession.
If someone close to him died, as his father did in 2002, Slater vowed to win his next contest in that person's honor. Everything was motivation.
Slater was in his prime, having won five consecutive world titles, when he retired in 1998, citing boredom and burnout. He stayed away from full-time competition until 2003, returning reenergized and with a new maturity.
During Slater's break, Andy Irons, the only surfer to challenge Slater's place as the sport's king, won two of his three world titles. But their rivalry didn't last and Slater reclaimed his throne.
Four days after Irons died in 2010, Slater won his 10th world title and dedicated it to him.
"Kelly always made it look so effortless. He was walking on water while others were sort of hiking."
Mark Cunningham, legendary bodysurfer
The ocean's machinations are ever-changing, forcing surfers to adapt wave to wave. In the same way, Slater is constantly transforming himself.
Fellow surfing pro Owen Wright calls him a "chameleon."