While Joe Root's century dominated discussions after play on the opening day at the Gabba there was a major question which hung in the air into the second morning: how good was England's total, which eventually finished on 334? Prior to the resumption, one former Australia player was overheard saying it was a day to cash in.
At 291 for 3, with Steven Smith and Cameron Green well set, building on the earlier work of Jake Weatherald's eye-catching 72 and Marnus Labuschagne's brisk 65, they had engineered an almost-ideal position to do just that. England were toiling away with 57-over old pink ball, which even under lights wasn't offering much.
Reaching the close on 378 for 6, a lead of 44, means they remain in control - although it might have been different had England held their catches - but one extraordinary over left the door ajar. Whether they are made to pay will become clear on Saturday.
Even by the early standards of this series, and with what day-night games can throw up, it was a remarkable period of Test cricket. A few moments earlier, Green had taken on Brydon Carse when he bowled short with an unorthodox field - three on the off, but no one from deep third around to mid-off, and six scattered on the leg. Green twice backed away and carved Carse through off side then Smith top edged a pull for six which just evaded Ollie Pope who was on the rope directly behind the keeper.
Carse changed ends, started with a very short bouncer which was called wide, then pulled the double-bluff by going full and straight. Green was already backing away before the ball left Carse's hand and ended up miles outside leg, almost off the cut strip in a position that will go viral for the wrong reasons, as he threw the bat out in vain to try and reach the delivery. It was out of character for Green, even by the standards of his white-ball batting.
"The short-ball plan is one of those things where everyone has their own methods." Weatherald said. "The way I'd probably go about it is different than the way Cam and Smithy went about it. Because of that, we probably scored in different ways and provided different problems for the England bowlers.
"Obviously Greeny backed himself…[he] probably would have his shot back if he could, we all can when we get out. But up to then, I think he put a lot of pressure on them, same with Smudge [Smith] as well."
Yet the over had only just started. Alex Carey was dropped in the gully first ball when he fended a short delivery which Ben Duckett couldn't gather. Two balls later, Will Jacks pulled in a spectacular one-handed grab at backward square leg to intercept Smith's pull. England sensed a way back but Carey and Michael Neser, not always entirely convincingly, combined in what could be a critical partnership.
Australia's overall scoring rate of 5.17 was, as it stood when play ended, the fastest they had scored in an innings of at least 60 overs. "It wasn't talked about," Labuschagne told the host broadcaster. "With [Travis Head] and Weathers at the top they just grabbed the momentum and we piggybacked off that and sort of kept going."
While the wildness of the passage of play that saw Green and Smith depart was at the extreme end, a look at Australia's scorecard suggests a day of unfulfilled potential with six of the top seven falling between 23 and 72 although Josh Inglis did not go to an aggressive stroke, bowled by one from Ben Stokes that perhaps kept a fraction low.
"I'd probably reframe that and say that we're in the position we are now, we have a lead before the next new ball, because of the shots we've been playing, the options we took," Weatherald said. "You'd probably say that some of the shots were a bit reckless at times, but at the same time, they backed themselves. As a group, that's what we want to do. In general, I think it came off quite well."
In a sense emphasising some of the cricket that was to follow, Weatherald's own innings felt like one of the more controlled elements of the day even though he was above a run-a-ball for much of its early stages and finished with 72 off 78.
For the second time in two innings, the opening partnership between him and Head took the wind out of England's sails. In Perth it was to set up victory, here it prevented early damage against the new ball, but was also scored at such a rate that Australia had wrestled control, and effectively cancelled out the last-wicket runs England flayed the previous evening.
It was Weatherald, in just his second Test, leading the charge rather than Head, who battled to 4 off 27 balls and was dropped by Jamie Smith. After three maidens, Weatherald opened the scoring with a strong cut against Gus Atkinson, although he needed some fortune for his second boundary in the same over when a top-edged pull flew over the keeper.
There was a compactness and punchiness to his play, no better illustrated than when he collected three boundaries in an over off Atkinson: a crunching cover drive, a clip through square leg and a crisp drive through point. Of Australia's first 36 runs, Weatherald made 28, although he later said he was as pleased with his leaving as he was with his aggressive strokes.
"I think we're quite an adaptable batting group at the moment," he said. "Obviously, Heady will always go about it the way he does. But for me, I'm just seeing and reacting and trying to get in good positions. I didn't actively go out there and play any differently than I normally would. It just ended up that way. It's a really good wicket to bat on."
After drinks, Weatherald arched his back and uppercut Carse over deep third for six. He went to 49 with consecutive boundaries: a clip down to fine and another brilliant uppercut over backward point. A swivel-pull to deep square then brought up a maiden Test fifty off 45 balls. The prospect of three figures was coming into view when, in Weatherald's own words, Jofra Archer "blew my foot off" when he was pinned lbw by a rare full delivery.
There remains a good chance that Weatherald has played an innings that helps Australia go 2-0 up in the Ashes, although it's not as clearcut as it could have been. But that really just continues the theme of the first four days of the series, which have left you turning up for the next day asking what could happen next.