It took just 34 balls for Australia to brush aside Namibia and book their place in the T20 World Cup Super 8.
Namibia took to the crease first but it did not take long for the Australian strike bowlers to have their impact, with Josh Hazlewood taking the wickets of the openers.
All five Australian bowlers claimed at least one scalp, with leg-spinner Adam Zampa starring to finish with four for 12 from three overs as Namibia were dismissed for just 72.
David Warner and Travis Head built a partnership of 21 before Warner was caught off the bowling of David Wiese for 20 runs off eight deliveries.
Head top-scored for Australia after he hit 34 runs off 17 balls as captain Mitchell Marsh (18) struck the winning runs with two balls of the sixth over remaining.
Unbeaten Australia, who play Scotland next, move to the top of Group B. England will be eliminated if Scotland beat Australia when the two sides meet in St Lucia on Saturday (0130BST on Sunday).
Earlier, Pakistan kept their hopes alive of reaching the T20 World Cup Super 8s after an unbeaten half-century from Mohammad Rizwan steered them to a comfortable seven-wicket victory over Canada.
Following their shock opening loss to co-hosts USA, and defeat against rivals India, Pakistan's tournament would have been over if they failed to triumph at the Nassau County International Cricket Stadium in New York on Tuesday.
Pakistan captain Babar Azam won the toss and put Canada into bat, with opener Aaron Johnson beginning the innings with back-to-back boundaries.
But Mohammad Amir set Pakistan on their way when he took out Navneet Dhaliwal's middle stump. New man Pargat Singh (two) lasted only six balls after he was caught at first slip off Shaheen Shah Afridi, with Nicholas Kirton scoring just one before he was run out in the seventh over.
Johnson continued to impress as he brought up Canada's 50 only for Shreyas Movva (two) and Ravinderpal Singh (zero) to fall in quick succession.
Johnson survived a scare when he was dropped on 44, taking advantage of Fakhar Zaman's mistake to bring up his half-century with four sixes. But Johnson (52) was removed by Naseem Shah with Canada setting a target of just 107 for their opponents, Amir the pick of the bowlers with two for 13.
Pakistan's Saim Ayub (six) fell in the fourth over but skipper Babar steadied the ship, bringing up the 50 partnership with opener Rizwan from 49 balls.
Babar was dismissed for 33 off 33 balls when he nicked Dillon Heyliger's delivery to keeper Movva.
However, Rizwan's 53 off as many deliveries allowed Pakistan to cruise to victory with 15 balls to spare.
Pakistan must beat Ireland in their final Group A match on Sunday, and still rely on results going their way to make it to the next phase.
