For those rugby fans who do not always appreciate what goes on in the darker recesses of the front row, Andrew Sheridan arrived at Twickenham on Saturday to give a lesson as chilling as sport gets.
Gold shirts in Australia's scrum rippled and writhed and eventually buckled time after time as Sheridan's constant pressure showed coach Andy Robinson the future of English rugby.
It was a brutal show of strength from the 26-year-old loose-head prop who was making his first start for his country, a man-of-the-match performance instrumental in giving England the platform for their 26-16 victory.
It was also one which belied Sheridan's favourite pastime of playing the guitar and writing gentle folk songs.
"I don't like to talk things up too much, just get on with trying to perform as best as I can," said the quietly-spoken Sale Sharks star who is tall for a prop at 6ft 5ins and weighs in at 18st 10lbs. "I was determined to enjoy the experience."
So devastating was Sheridan's effect on tighthead Alastair Baxter that the Aussie prop was sent to the sin-bin in the 75th minute by referee Joel Jutge for repeatedly dropping the scrum.
That yellow card was as much an act of mercy as discipline.
When Matt Dunning then switched sides to face Sheridan he was left prostrate following the next scrum with a neck injury which required lengthy treatment and his removal on a stretcher.
With no specialist prop left to face Sheridan, the referee was left with no choice but to call for uncontested scrums and the psychological devastation of the Sale man's work was complete.
As befits the world-wide camaraderie of the front-row club, Sheridan was first to check on the condition of Dunning, whose injury was later discovered not to be serious.
"It's always disappointing when you have uncontested scrums," said Sheridan. "Rugby is important but when you see someone who has a potential neck injury it puts things in perspective.
"The front row was an area where we had put a lot of work into in the last couple of weeks. We just wanted to deliver the goods on the day."