The math simply does not work.
After openers Usman Khawaja and Aaron Finch put together 147 runs in the chase of Pakistan, Australia slid from 0 -142 to 202 all-out after losing 10 wickets for a paltry 60 runs.
The Baggy Green might have been better off to have skipped lunch and perhaps two much bangers and mash left them lethargic and unable to connect eye with bat.
Khawaja and Finch were the only two to survive past 20 and when Finch went down on 62, Pakistan wasted no time in pressing its advantage.
Pakistan Test debutant Bilal Asif, an off-spinner, took six wickets for 36 runs, including the total blanking of Travis Head and Marnus Labuschagne, both of whom, like Asif, were making debuts at Test.
Asif will cherish the video of his first outing for as long as he lives, as he also sent Shaun Marsh and Tim Paine off for seven each, along with holding Nathan Lyon to six.
Lest anyone think losing 10 wickets for 60 runs is about as bad as it gets, it should be recalled that two Tests ago, Australia lost 10 for 50 in the wake of the ball-tampering scandal in South Africa that cost them the services of Steve Smith, David Warner and Cameron Bancroft.
Only a bit of inattentive fielding by Pakistan prevented the result from being worse. On 17, Khawaja was given new life when, after missing a leg-break from the hand of Yasir Shah, Sarfraz Ahmed bungled the stumping. Khawaja was again saved on 38 when Shah could not convince his captain or the umpire that Khawaja should have been judged caught at bat-pad.
Pakistan provided another opportunity later when Shah sacrificed a wicket by dropping a return catch off Mitch Marsh, but that slip did not prevent Marsh from joining the procession to the pavilion.
Pakistan kept Australia alive when Jon Holland accounted for first-innings century make Mohammad Hafeez for 17, and then Azhar Ali for four. Nathan Lyon then handed Asif a duck as payback for his six.