He certainly was not thinking - as the Sherrin plopped in his hands - about the 100,000-odd people who would watch his mark on YouTube the following week.
And as gravity took hold of him to drag him back to earth, he was hardly pondering the 40,000 Americans, or 10,000 Argentines, who would celebrate his mark via the internet.
On one US website the headline trumpeted: Australian rules football player climbs up an opponent's back to make a spectacular catch.
While such marks are now commonplace for the Carlton acrobat (who rivals Demon Jeremy Howe for the title of the Brett Burton, or Trevor Barker or Alex Jesaulenko, of our era), it seems extraordinary that Americans have viewed the mark in twice the number than Australians.
Carlton assistant coach and former Melbourne player Brad Green saw the mark from the Blues' interchange bench.
"It casts my mind back to a couple of my old teammates – 'Robbo' (Russell Robertson) did it for a long time, and Jeremy Howe had about 10 contenders for Mark of the Year last year," he told AFL.com.au.
"And it's certainly exciting to now be coaching a guy who has some of those attributes.
"They have some common traits: they've all got a spring in their step, and they’re fantastic athletes with the agility, speed and power that makes them big jumpers."
Asked how he rates Walker's latest hanger against those he has seen from his former teammates, Green didn’t hesitate.
"It's right up there," he said. Literally.
Green says players of this trio's ilk, who can perform such extraordinary, unpredictable acts, can be extremely valuable.
"It's great having players like that in your side because it makes it hard for the opposition to plan for," he said.
"A player like 'Walks' has the speed and agility to mark at full pace on a lead, but then if you try to get in front of them to stop their run they can jump on your back.
"Mick and the rest of the coaches encourage players to play to their strengths, and it's certainly one of Walks's strengths to take marks like that."
In round 18, 2011, the Carlton utility leapt into footy folklore when he soared above Essendon defender Jake Carlisle.
Walker's speccy didn’t win the AFL Mark of the Year – contentiously, that honour went to Collingwood's Andrew Krakouer instead – but the League has this year seen fit to use footage of the grab as part of its international marketing campaign.
Green said Walker, 26, has enjoyed "a great pre-season" and is set for a big year.
"He's the ultimate professional – he trains hard, he works hard, and he's in the top three at the club for running endurance," he said.
"He's got so much upside for our side and we're looking forward to seeing where that takes us."
