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The 53-year-old skateboarding icon is at the Games as a commentator - not a competitor - but naturally, he couldn't resist trying out the Ariake Urban Sports Park.
Taking to Instagram, he hailed the inclusion of skateboarding at the Olympics for the very first time.
He said: "As a kid that was mostly lambasted for my interest in skateboarding, I never imagined it would be part of the Olympic Games.
"It's surreal to now be in Tokyo bearing witness to this milestone in the most unprecedented circumstances."
He continued: "I know in the end it will help to grow skateboarding's profile internationally, exposing our passion to an audience that has never seen it before or simply refused to embrace it.
"A whole new generation will get to experience skateboarding with genuine public support and meaningful opportunity.
"I predict it will be one of the highlights from all of the Olympic Games coverage this year. And I'm here for it."
There will be two separate skateboarding competitions at the Games: street and park.
In the former, competitors have a set time limit during which they can choose whatever route they please as they ride around a course filled with urban features such as stairs, handrails, curbs, benches, walls, and slopes.
Factors considered when working out scores are: difficulty of the tricks, height, speed, originality, execution, and composition.
Park has its roots in the drained swimming pools that skaters used in the Venice Beach area of Los Angeles when skateboarding first emerged.
The smooth bowls have steep curved inclines meaning skaters can reach huge heights, and they have the freedom to put together a run as they see fit.
Again, the competitors are scored for the difficulty and the originality of their tricks.
The men's street contest is tomorrow (Sunday 25 July), with the final scheduled for 12.25pm local time (4.25am UK time).
The women's street competition is the day after (Monday 26 July), with the final scheduled for 12.25pm local time (4.25am UK time).
The women's park contest will take place on Wednesday 4 August, with the final scheduled for 12.30pm local time (4.30am UK time).
And the men's park contest will take place on Thursday 5 August, with the final scheduled for 12.30pm local time (4.30am UK time).
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