Swimmer Ariarne Titmus might have won the gold medal, but it was her coach who captured people's attention - thanks to his ecstatic celebration.
People were left in hysterics at the Australian swim coach's reaction after the 20-year-old won gold in the women's 400-metre freestyle final.
In a nailbiting race, Ariarne, whose nickname is 'Arnie' beat American swimmer Katie Ledecky, after a neck-and-neck race to the pool edge.
No one seemed happier than her coach, Dean Boxall, whose hilarious reaction was caught on camera - while a stadium employee tries (but fails) to keep him calm.
After ripping his face mask off, he begins to furiously scream before thrusting at the safety barrier and punching the air.
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Boxall told Australian network Channel 7 his reaction "built-up" as he watched Ariarne edge her way towards winning gold.
He said: “I used to wrestle with my brother, and he (Ultimate Warrior) was my favourite, and he died, he passed away, I loved the Ultimate Warrior.
“It built-up. When I saw the race unfolding I couldn’t keep it in. I need to apologise because I actually took my mask off by mistake and it ripped and I just lost it in the moment.”
He added: “So when I saw it starting to build I thought, ‘here we go’, I thought ‘she can do this’. Unbelievable to execute that under pressure.”
His reaction went viral on Twitter, when the Australian swim coach shared it, adding: "Ariarne’s coach Dean Boxall sums it up perfectly!"
Another person joked: "It feels like we’re going to need Matthew McConaughey to play Dean Boxall in some sort of movie."
A third added: "The Dean Boxall moment was almost designed to go viral. I’d never heard of him before but pretty confident he’ll now never have to buy himself a beer ever again.
"The Tokyo 2020 volunteer behind Dean Boxall trying to contain him...ain't gonna happen," joked another.
