Travis Head clobbers century off 69 deliveries after being promoted up the order to open Australia's second innings.
Makeshift opener Travis Head scored a brilliant 83-ball 123 to steer Australia to an astonishing eight-wicket victory inside two days against England on Saturday, powering his side to 205-2 late in the final session of the Ashes opener at Perth Stadium.
The manic style of cricket, which produced the shortest Ashes Test by overs-bowled to deliver a result since 1888, kept the crowd enthralled as both sides gained and relinquished the ascendancy throughout.
England had set Australia a target of 205 after being bowled out for 164 by tea on Day 2, losing nine second-session wickets in the wake of a Scott Boland seam masterclass of four for 33. The tourists had made 172 in their first innings.
Head, taking the place of opener Usman Khawaja, who gingerly left the field in England's 27th over with back trouble, got Australia's run chase off to a rollicking start, giving England a taste of their own 'Bazball' medicine in the third session.
The near 50,000-strong crowd came to life when Head slashed Brydon Carse (2-44) for six over third man to bring up 50 for his side, and later roared their approval when he peeled four boundaries off Ben Stokes' second over.
Marnus Labuschagne added an impressive 49-ball 51 after debutant Jake Weatherald (23) had fallen to Carse, but the moment belonged to Head, who brought up Australia's equal-third fastest century with a risky upper-cut and a scurried single.
The fourth innings raced to a conclusion with Head clubbing four sixes and 16 boundaries before launching Carse to Ollie Pope at deep midwicket, hugging Labuschagne and soaking in the applause as he walked off.
Stand-in skipper Steve Smith, unbeaten on two, hit the winning run with a single punched to the off-side.
Earlier, Australia took nine wickets in the second session to bowl England out for 164 in the second innings at tea, leaving the hosts needing 205 runs to secure victory.
Returning from the lunch break at 59-1, England gave seamer Scott Boland (4-33) his first breakthrough when opener Ben Duckett was caught in the slips for 28.
The 36-year-old claimed two more in his next over, with Ollie Pope left punching his bat in frustration after being caught behind on 33 and Harry Brook trudging off for a three-ball duck having nicked to Usman Khawaja at first slip.
The loudest roar of the day came when Joe Root chopped-on Mitchell Starc (3-55) from well outside off-stump to depart for eight.
Not even the support of the 'Barmy Army' could lift the tourists, as Starc celebrated his first match-haul of 10 wickets in an Ashes Test with a bouncy delivery that Ben Stokes, on two, could only get as far as Steve Smith at second slip.
A pain-staking caught-behind review, where Jamie Smith was adjudged to have feathered debutant Brendan Doggett (3-51), saw the exit of England's last recognised batsman for 15 as the home side pressed their advantage.
Gus Atkinson and Brydon Carse put together a valuable 50-run partnership at the tail but Boland closed out the innings by having Atkinson caught in the deep for 37.
England were 59 for 1 at lunch as they extended their lead to 99 runs as Australia's pacers failed to make significant inroads early in the third innings.
The home side, all out for 132 in the first innings, could add only nine runs to their overnight score.
Tailender Brendan Doggett was unbeaten as seamer Brydon Carse, who claimed 3-45, had Nathan Lyon out for four, chipping to Ben Duckett at gully.
On an extraordinary Day 1 where fast bowlers took a combined 19 wickets, Australia's Mitchell Starc registered 7-58 to help skittle England for 172 before visiting skipper Ben Stokes emphatically responded with 5-23 to shock the hosts.
England's Zak Crawley fell to Starc for a duck in the first over for the second time in as many days, with the Australian pace spearhead pulling off a spectacular left-handed diving catch during his follow-through.
Starc, 35, has shouldered extra responsibility with fellow quicks Pat Cummins and Josh Hazlewood sidelined due to injury, and with the usually-reliable Scott Boland unable to make any breakthroughs.
Duckett had a stroke of luck when he found the boundary after a thick Starc edge went through the gap between slips and gully. The opener was on 28 not out while number three Ollie Pope compiled 24 not out.
Barring a close leg-before appeal by Boland on the stroke of lunch, which Duckett had overturned on review, the two batsmen found it smooth sailing and rotated the strike aggressively to maintain a breezy run-rate of nearly four an over.