Yachvili and Barkley exchanged penalties before prop Wilson saw yellow for hands in the ruck.
Jarvis then hit the upright again minutes later when Sale entered the ruck from the side.
Scrum-half Gareth Jones remains seriously ill in hospital after he was caught up in a ruck.
Elissalde landed another penalty in the 22nd minute, awarded for Irish hands in the ruck.
Myler nudged the Saints back ahead with a difficult penalty after Mustoe was isolated at a ruck.
Connacht's frustration was compounded as flanker John Muldoon was yellow-carded for dangerous driving play at a ruck.
Ryan Caldwell was the first to go for deliberately preventing the ball coming out of a ruck.
Wyn Jones cost the Ospreys another three points for using his head while taking out of the ruck.
He was held up short but the Australian scrum-half snapped on to the ruck ball and dived over.
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The biggest cheer of the night came moments later after Dallaglio was yellow-carded for infringing at a ruck.
Newcastle had taken the lead at The Stoop when Gopperth kicked an 18th-minute penalty following a ruck offence.
They will also clamp down on players who clear out opponents not involved in a ruck or maul.
McAlister's conversion made it 24-28, and the Maori regained the lead after turning over England ball at a ruck.
But as they tried to run down the clock, the visitors were penalised for an offence in the ruck.
Biggar dropped a goal in the 54th minute and added a penalty when Alan Quinlan transgressed at a ruck.
Liam Craig's delivery was perfect for Grainger whose powerful volley flashed past a ruck of players but not Langfield.
And Ex-Dragons prop Rhys Thomas followed him just three minutes later for recklessly lunging head first into a ruck.
Ulster blindside flanker Thomas Anderson was sin-binned after he was adjudged to have gone over the top of a ruck.
And they soon slipped further behind after Phil Vickery was penalised, and sin-binned, for kicking the ball through at ruck.
Accies goalkeeper Tomas Cerny then made his first save from a Danny Grainger strike which flashed through a ruck of bodies.
The scrum-half saw space in behind a ruck to chip, gathered the ball and fed Mefin Davies steaming up behind him.
Dempsey was then robbed at a ruck and Carr linked with Nikora before gleefully dotting down to the left of the posts.
Eventually it proved too much as Vainikolo picked up from a ruck and stepped around Chris Robshaw to score his second try.
Rodriguez missed from distance after James Haskell conceded a silly penalty at the ruck before Wilkinson's long-range penalty edged England ahead again.
After Portsmouth's recent defeat at Fulham, it is understood the players held a mini crisis meeting, which Crouch described as "a ruck".
Kelly Brown was sin-binned for coming in from the side of a ruck and Jones reduced the deficit with the resulting penalty.
Mafi was then yellow-carded for a professional foul at a ruck, handing Parks the chance to reclaim the lead for the Warriors.
Andrew Ruck, 27, from Brighton, 17-year-old Patrick Flinders, from Jersey, and 16-year-old Scott Bennell-Smith, from St Mellion in Cornwall, were also injured in the attack.
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"We do look forward to inviting Nicky back to Cardiff and hopefully we will see him in the odd ruck or two!"
Wales had gone over the top at a ruck just their side of the halfway line but directly in front of the posts.
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