As other skateboarders paused to catch their breath, South African Olympic aspirant Brandon Valjalo moved ahead and sped down the next ramp, slid along a rail and spun into the air.
Landing gracefully on his feet, the 22-year-old was visibly dissatisfied with his technique and went back for another round.
A low, late autumn afternoon sun shone over the church-sponsored skatepark in Johannesburg's affluent suburb of Sandton.
Young athletes, some shirtless, launched themselves skyward, spinning and slamming the concrete as a small crowd cheered from behind a meshed fence.
Brandon Valjalo, 22-year-old, is just two events from representing South Africa at the upcoming Tokyo Olympics.
Valjalo, wavy blonde hair pulled back in a ponytail, was the main attraction.
Spots are guaranteed for the world's top 20 -- a far distance from Valjalo's 49th place.
But the skateboarder is still "pretty confident" he will make the Olympics roster.
As the number one in Africa, he is likely to qualify as the continent's representative regardless of his global ranking.
South African skateboarder Brandon Valjalo falls during a training session at the YBF skatepark in Johannesburg.
'Dream come true'
Valjalo first stood on a board at the age of three, when he found his brother's old skateboard in the garage.
At nine years old he developed a passion for the renegade sport that has thrived on American and European sidewalks since the 1960s.
Valjalo entered his first professional competition in 2013, aged 14, and won a championship a year later.
With trophy after trophy, Valjalo worked his way up to winning the African championships in 2017, which earned him invitations to compete against the European elite.
South African skateboarder Brandon Valjalo poses during a training session.
Representing South Africa at the Olympics will be an "honour", said the athlete, who looks up to basketball star LeBron James and footballer Cristiano Ronaldo.
'Crusty' streets
Valjalo has trained at skateparks across the world, from California to his own back yard.
But it is the "crusty" South African streets that honed his skills.
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Born and raised in Johannesburg, Valjalo recalled long drives around a city rife with street crime to find good skateboarding spots.
He compared it to training on sand to run faster on grass.
Skateboarders disagree on whether the discipline should be treated as a competitive sport or left to the street, where it first originated.
But Valjalo argued "artistic" street boarding and competitions were both important, adding that the Olympics would give the sport more visibility.