Gayle took a liking to Plunkett, thrashing him through the covers, down the ground and over backward point.
Owais Shah drilled Schiferli to deep square-leg, then Eoin Morgan reverse-swept Borren to backward point.
They also lost Amla before the close as he square cut Benn straight to backward point.
And Lara fell before tea, slashing McLaren to backward point after hitting 10 fours and a six.
Long-serving spinner Richard Illingworth claimed the day's first wicket, when Christopher Gayle sliced to backward point on 15.
Mohammad Ashraful also went for 15 just before lunch, hitting a wide ball from Lawson to Sarwan at backward point.
And the former Leicestershire batsman eventually reached his half-century off 128 balls as he drove Boje to the backward point boundary.
Eight overs later, de Villiers completed his fine 108-ball ton by cutting Daren Powell between backward point and square cover for four.
Australia wrapped up the win when Vettori found Ponting at backward point.
The duo took the score to 117-1 in the 13th over before Thomas had Croft caught at backward point with a slower ball.
Then a moment of inspiration put the tourists firmly on top again as Dalrymple's stunning one-handed catch at backward point ended Watson's innings.
BBC: SPORT | Cricket | England | England seal historic one-day win
It flew to backward point where Sammy, the first St Lucian to play for the West Indies, dived forward to try and take the catch.
The departure of McKenzie, taken by Mehrab Hossain jnr at backward point, proved to be the only glimmer of light on a disappointing day for Bangladesh.
But South Africa were caught unawares by Harmison, whose previous highest Test score was 42, and he passed that by crashing Nel past backward point for four.
Last man Ashish Nehra stuck around with Laxman for 44 minutes before being run out for a duck by a direct hit from Ramnaresh Sarwan at backward point.
The ball disappeared with tremendous velocity over wide long-on, backward square-leg, extra-cover, backward point and mid-wicket while Broad and skipper Paul Collingwood played the role of startled rabbits.
Yuvraj and Dhoni were India's last hopes and the former responded by belting Collingwood through the covers, Bopara through backward point and Tremlett over mid-wicket with real ferocity.
Sean Ervine followed, taken at backward point, and Lamb became Rayner's fourth victim just before bad light ended play an over early with Martin-Jenkins having also struck twice.
Raina fell for 43 when he sliced a Flintoff full toss to Collingwood at backward point and, four balls later, Yusuf Pathan pulled Harmison weakly to Bell at midwicket.
However, the new man at the crease, Denesh Ramdin, notched just one run before cutting straight to Alviro Petersen at backward point off a short delivery from the fortunate Tsotsobe.
Pakistan's response was to become more circumspect and Butt passed fifty before Yuvraj struck a hammer blow, brilliantly throwing down the stumps backward point to get rid of Mohammad Yousuf.
That said, the pair kept the scoreboard ticking over at a healthy rate and, although Gambhir was dropped at backward point by Raqibul Hasan off Shahadat Hossain, they were rarely troubled.
Bell tried to up the ante but only succeeded in flashing at a ball from Jacques Kallis and AB de Villiers held on to a spectacular diving catch at backward point.
Simmons collected 4-19 from his three overs of medium pace, Dilshan falling in the 18th over when another reverse sweep only found the tall figure of Sulieman Benn at backward point.
Sachin Tendulkar waited 17 deliveries before he picked up his first boundary, a pull off Anderson in the 10th over, but two balls later he was snapped up by Collingwood at backward point.
Left-arm seamer Aamer, who has just turned 17, persuaded Bopara to spear a catch to backward point where Shoaib Malik took a good catch at head height, a couple of yards to his left.
On came Edwards, so impressive in the first Test against England, and he was immediately rewarded with Strauss slicing one at the diving Pollard at backward point but the ball popped out of his hands.
Murray Goodwin (39) gave him a simple return catch and Smith, who had struck two sixes out of the ground in the previous over from Samit Patel, sliced a drive to backward point for 27.
The right-hander profited by hammering over backward point for six and thrashing through the covers to reach 50 off 38 balls, while Gambhir got to his fifty off two fewer deliveries by punishing a Chris Tremlett full-toss.
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