A Western Bulldogs fan grabbed the attention of the footy world with his reaction to a marginal decision during a thrilling first ever wildcard final.

The Bulldogs and Pies faced off at Marvel Stadium on Friday night for a place in the elimination finals next weekend.

Watch the Dogs fan’s reaction via the video player above

It went all the way down to the siren as Tim Membrey missed the chance to win it for Collingwood, with the Dogs running out 96-93 winners.

But the drama started much earlier in the evening during the first quarter.

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Collingwood trailed 25-18 with just over two minutes remaining in the quarter when Dan McStay leapt to try and earn a mark on the Dogs’ goal-line.

Although he got his hand to the ball, it was initially determined that it had gone out of play.

However, new cameras on the goal-line, which have been introduced just for the finals, then showed a part of the ball was still in play.

The officials overturned their original call to hand the Pies a mark — which McStay scored from.

This infuriated a Dogs supporter in one of the front rows. He could be seen repeatedly screaming “How?!,” prior to McStay’s goal.

After the Pies star converted, the cameras then cut back to the same fan who was still shouting “How?,” at the officials.

“I’ve never seen a young man scream, “How? more often than that fellow (Bulldogs cheer squad member) just there in the space of the last minute and a half,” Hawthorn legend Jason Dunstall said on Kayo Sports.

“But this is the great thing about Dan McStay and what he’s brought to Collingwood when they’ve needed it.

“He’s taken contested marks, that’s one against two, and then it’s not just the mark, he’s finishing when at times in the past he’s had horrors in front of goal as well.

“He’s become accurate, he’s found a way to convert, and he is providing a real asset.”

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And fans on social media also got involved in the supporter’s reaction.

Lodz said: “That Bulldogs fan screaming out ‘HOW’ like 5 times was hilarious.”

While Becca added: “That Dogs fan is still going.”

And Peter Phoebe reacted: “Can’t disagree with that Dogs supporter repeatedly yelling ‘HOW?’”

The cameras installed for the finals are capable of capturing 200 frames per second and have been implemented to try and eradicate goal-line controversy.

The Dogs will now face the Adelaide Crows in the elimination finals next Saturday.