Coach Leon Cameron has panned Greater Western Sydney's performance against Collingwood as the team's poorest hour of footy this AFL season.
Whether the 32-point loss is an anomaly, he says, will depend on their reaction against Brisbane next weekend.
The 11th-placed Magpies put a significant dent in the Giants' consistent campaign - and their top-four hopes - with a 32-point win at Spotless Stadium on Saturday.
Though the Giants led by 24 points at the first break, Nathan Buckley's impressive side booted nine goals to take an 18-point lead at halftime and never ceded control.
Cameron couldn't put his finger on exactly what went wrong, and whether or not the display was just an aberration.
"Time will tell really," Cameron said.
"We obviously haven't returned after the bye in the shape we needed to.
"But Collingwood, to their credit, were just too hard for us. S
"They won around the middle of the gSround where it mattered most.
"They won the stoppages and won the contested ball - it was a massive turnaround after quarter-time.
"For the next 60 minutes they dominated that area and that's where the game was won.
"We've had 15 games and been pretty good in most of them, but that 60 minutes was probably our worst 60 minutes of the year."
The loss combined with the Western Bulldogs' win over Richmond has dropped the Giants from third to fifth on the table with a further slide likely before round 16 is out.
Adelaide and North Melbourne are on equal 40 points with the Giants and still to play on Sunday, while the Kangaroos' opponents West Coast are on 36 points but capable of overtaking on percentage.
It makes next week's away match against the Lions all the more crucial.
"We've got to review this really well, we're not going to hide away from it," Cameron said.
"The proof will be in the pudding whether or not we address the areas we were poor at and fix them up next Sunday."