Steve Smith could regret deciding not to enforce the follow-on after England ripped through Australia's top-order in Adelaide.
The Australia skipper followed a growing trend in Test cricket when he opted against sending England in to bat again on day three of the pink-ball Ashes Test.
England were bowled outfor 227, trailing Australia by 215 runs, with more than 90 minutes left in Monday's evening session.
Smith opted to rest his bowlers rather than give them a second bite of the cherry under the Adelaide Oval lights, where the pink ball has tended to be at its liveliest.
And England took full advantage of the movement on offer, dismissing Smith, David Warner, Cameron Bancroft and Usman Khawaja to leave Australia 4-53 at stumps.
The hosts will take heart from their 268-run lead but Test great Shane Warne pondered whether Smith had made the right call.
"It's hard not to talk about the fact Australia haven't enforced the follow-on when the ball is nipping around like this," he said while commentating for the Nine Network.
"England now have this ball talking. They are all over Australia at the moment under lights. It doesn't get much harder than this when you've got the bat in hand."
Australia's bowlers weren't consulted by Smith but Mitchell Starc said he and fellow quicks Josh Hazlewood and Pat Cummins were comfortable with their workloads.
"Obviously we had a tough session with the bat, but we've got a lead of 260-odd and a lot of batting in the sheds," he said.
Worse decision: Root at the toss? Smith not enforcing follow on?#Ashes
Might have been half-understandable if Australia had been toiling in grilling heat for a day and a half. As it is - inexplicable. What did they hope to achieve? #asheshttps://t.co/7a1P42qP9H
This is hilarious. Call me old-fashioned, but the modern follow-on phobia is coming back to bite Australia, who are 52-4 when they could have put England in again at night.
