But he was on target two minutes later from a penalty which saw Bath lock Peter Short sent to the sin bin for pulling back Blues number eight Xavier Rush off the ball.
Edinburgh number eight Allister Hogg was sin-binned for going offside at a ruck as the pressure increased, and another complex midfield move bamboozled the defence.
With Leinster players queuing up to score however, Quins number eight Nick Easter was sin-binned for a deliberate knock-down, Contepomi stroking over the penalty for a 6-0 half-time lead.
Glasgow number eight Kelly Brown was sin-binned in the 64th minute, to eager tackling off the back of a ruck, but the Scots still held the cushion of a 38-21 lead.
Two more successful kicks from Biggar, the second coming after Munster number eight James Coughlan was sin-binned for hands in the ruck, left the home side with a mountain to climb at 15-3 down.
Poor discipline had resulted in the world champions being reduced to 14 in their previous two Tests against New Zealand, and in Brisbane they saw yellow as early as the third minute when centre Fourie was sin-binned for a dangerous tackle on number eight Richard Brown.
The Ospreys' wobble continued after the break, Phillips sin-binned for a trip on opposite-number Blair as the scrum-half took a quick penalty.
Phillips was sin-binned for a high tackle on Ospreys number eight Jon Thomas, but the Blues still managed to dominate the remainder of the half.
Nadolo and Exeter number eight Richard Baxter were sent to the sin-bin as the officials tried to regain control and it was the Fijian wing who rounded off the evening when he returned to score a late consolation try.
Cooper's previous good disciplinary record was one factor taken into consideration, but the 22-year-old will now miss next Saturday's match against New Zealand in Melbourne and the 7 August Bledisloe Cup test in Christchurch following his spear tackle on opposite number Morne Steyn, for which he was sin-binned.
Leeds' position was made all the more precarious when number eight Rhys Oakley was the second visiting player sin-binned with eight minutes to go.
For the fiercely self-regarding Yorubas, General Obasanjo, one of their number, has committed what is for them the ultimate sin he rejects Yoruba nationalism.
Dragons prop Adam Black was sin-binned for holding down at a ruck and, moments later, number eight Kingi romped through a gap 15 metres out to put Treviso back in front.
Sharks number eight Sebastien Chabal was lucky not to follow Jones to the sin bin when he kicked the ball away after his side were penalised for standing up in the scrum.
They enjoyed a string of hits in the 1980s, starting with their 1986 number one West End Girls, and including their other chart-topping singles It's A Sin, Heart and Always On My Mind.
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