In an incident Wallabies coach Michael Cheika admits you rarely see, replacement halfback Nick Phipps gave away a crucial penalty at Twickenham for shoving the Argentina team doctor to the deck.
The bizarre moment occurred during a break in play as several Wallabies were being attended to before a scrum, and the medic appeared to be trying to intercept a ball being thrown in to Phipps by the ball boys.
When the medic reached for the ball first, Phipps pushed the stunned support staff member who crashed to the ground sparking the all-in brawl.
Phipps' shove of the high-vis-vest-wearing medic drew an immediate and angry response from the Pumas players, who ran from across the field for retribution - with winger Matias Moroni knocking the Australian to the turf.
The incident was replayed several times on the big screen and ultimately Argentina was awarded a crucial penalty - in place of the scrum feed Australia were due to have - which reduced the Wallabies' lead to four.