Fremantle big man Josh Treacy summed up his side’s performance with a nightmare moment in Friday night’s loss to Brisbane.

In a high-stakes clash, the reigning premiers flexed their muscle with a brilliant victory as the shellshocked Dockers had no answers.

WATCH THE VIDEO ABOVE: Josh Treacy spurns certain goal.

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The Lions kicked the only three goals of the first term and then put the foot down with a dominant third quarter to silence the Optus Stadium crowd.

Treacy had earlier kicked two goals, but threw away a certain third with a monumental blunder.

After taking a strong mark at the top of the goalsquare, Treacy turned around and played on with the goals at his mercy.

But he took a fraction too long to get the kick away and that gave veteran Lion Ryan Lester just enough time to disrupt the attempt.

“Oh no! A calamity, a disaster,” commentator Anthony Hudson said.

Garry Lyon added: “It’s a Nick Riewoldt moment,” in reference to the famous incident from the 2010 grand final replay.

The Dockers were trailing by 32 points at the time and needed a spark in the shadows of three-quarter time.

Rising Star contender Murphy Reid did provide that with a long-range goal, but the Lions had the immediate reply through Cam Rayner.

Hugh McCluggage nailed the first of the final term as the Lions cruised to the big win.

The victory confirms the Lions’ position in the top eight ahead of next Sunday’s blockbuster against Hawthorn.

Had Brisbane lost then they could have missed the finals with another defeat next week.

But the situation is now critical for Fremantle, who will likely need to beat the Western Bulldogs next week in a potential clash for the final spot in the eight.

And that match could shape as the final game of Nat Fyfe’s career after he announced his retirement earlier this year.

Supersub Fyfe, who came on in the final quarter, finished with eight disposals and a clearance, and was given a guard of honour by both teams after the match.

“It’s very strange, it’s not my style to announce my retirement and keep going,” Fyfe told Fox Sports.

“I would have liked to have just disappeared quietly. But we still have business to complete.

“I will soak in every single minute. This could be the last time I’m out here (at Optus Stadium), and if that’s so, that’s okay.”

The Lions were at their ruthless best against wayward Fremantle, but the win came at a cost, with midfielder Jarrod Berry dislocating his left shoulder in the final quarter after being bowled over by Andrew Brayshaw.

Zac Bailey was huge for Brisbane with 28 disposals and two goals, while Hugh McCluggage (28 disposals, eight clearances, one goal) and Jaspa Fletcher (32 disposals) racked up big numbers.

Lions forward Logan Morris finished with four goals, including two in a dominant final quarter, while Charlie Cameron kicked three majors.

For Fremantle, Caleb Serong (26 disposals, eight clearances) battled hard, while Josh Treacy kicked two goals but committed a host of uncharacteristic errors.

Brisbane racked up a whopping 47 uncontested marks in the opening quarter to throw Fremantle off their game, with the Dockers only registering 0.5 for the term.

The Lions were able to kick three goals to take a 15-point lead into the first break, with Dayne Zorko racking up 11 disposals and 225m gained.

Fremantle came out firing in the second quarter - but their early reward was a mere three behinds as their kicking yips continued.

Bailey silenced the crowd when he kicked the ball over his own head to split the sticks from 15m out.

And when Dockers defender Brennan Cox put down Morris 100m off the ball to hand the Lions another goal, alarm bells were ringing.

The margin was 25 points at that stage, but Treacy played like a man possessed for the next few minutes.

Treacy kicked two quick goals to finally end Fremantle’s drought, and when Andrew Brayshaw chipped in with one of his own, the margin was back to just eight points by half-time.

Fremantle undid their good work with a poor start to the third, with the Lions piling on four unanswered goals to extend their lead to 32 points.

- with AAP