And that lead was extended six minutes before the break when wing Tagicakibau pounced on a loose ball to race through under the posts for the hosts' second try.
On the restart, Rovers survived an early scare close to their own line but when, on his return to action, Rob Purdham flung out a wild pass on 44 minutes Dobson snatched the ball to race 80 metres to claim his second try.
He showed a great turn of pace to make a few yards up on Aberdeen left-back Smith to beat him to a ball over the top, race into the box and smash the ball beyond Langfield.
Every other ball, luncheon, race and event comprising the 50-day Spring Racing Carnival radiates outwards from that moment.
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But in a three-way race the ball takes funny bounces, and that is how Minnesota got a 6 ft. 4 in.
Mike Blair sensed where the space was and the scrum-half zipped the ball right where Cairns was waiting to race over.
Young, who had come on as a replacement for the injured Shane Stewart, steamed onto the loose ball, and the youngster won the race for the touchdown near the Glasgow posts.
Murphy took further advantage of the extra man four minutes later by crossing the Ospreys line after O'Leary picked up a loose ball and passed for the winger to race over in the corner.
But it was one of the Scarlets' rookies - Jon Davies - who helped seal the result as the centre came flying up in defence to floor Ceri Sweeney, knocking the ball loose for Williams to gather and race under the posts.
Casillas looked jittery again when he parried a pile-driver by Tiago and had to race to beat Hugo Almeida to the ball, which was dropping towards the net.
Australia, 153-6 going into the final over, lost Mitchell Johnson cheaply yet ended on a high as Mike Hussey clubbed an Edwards no-ball for six and then saw an outside edge race past short fine-leg for a bonus four.
McQuoid used his devastating pace to race towards goal, lob Gallacher and thump the ball into the net beyond the despairing Scot.
"There is no question the race for majority leader has been dealt a curve ball, an unexpected one, the reluctant candidacy of Dennis Hastert, " Paxon said.
Van Persie was the creator with a superb pass that let in Samir Nasri, and when he lifted the ball over Gomes, Adebayor beat Alan Hutton in a straight race to poke home from almost on the goal-line.
Castaignede won the race for the touchdown, but looked to have knocked the ball forward over the line, rather than getting downward pressure.
Carter fielded an aimless clearance and popped a simple ball to Muliaina on the scissors, allowing the full-back to race through almost untouched for an unconverted try.
But the Irish wilted in the closing minutes, and after Scelzo had forced his way over Bartolucci won the race for a kick ahead to touch down inches inside the dead-ball line.
And the lead changed hands for a third time on 50 minutes when Garreth Carvell grasped the ball from James Roby and held off the Saints cover in a 70-metre race for the line.
The full-back re-gathered the ball, chipped again and, after Yannick Jauzion had kicked through, Donguy won the race to touch down for an extraordinary score.
Among the other factors in the tight nature of the Atlantic race: Each of the teams has an established identity on one side of the ball or the other.
Liverpool were getting forward in numbers and a couple of crosses from left-back Paul Konchesky troubled the Bolton defence before Jaaskelainen reacted quickly to race off his line and prevent Torres latching on to Maxi's through-ball.
Rob Howley brilliantly reclaimed his own kick ahead and the ball was spread left for wing Craig Morgan, who had an earlier score disallowed for offside, to race in at the flag.
They did pushups, twirled hula hoops, and competed at dodge ball and tug-of-war before the first lady triumphed over the comedian in a climactic potato sack race.
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