The Brumbies added the Melbourne Rebels' scalp to their growing collection with a clinical 30-13 win in their Super Rugby clash at AAMI Park.
After accounting for Queensland in the opening round, the Brumbies delivered an emphatic second-half performance to stamp themselves as the Australian conference heavyweights.
The Rebels led 13-12 at halftime but they were starved of ball in the second stanza and injuries to their attacking maestros James O'Connor and Kurtley Beale cruelled their chances as the Brumbies piled on 18 unanswered points.
O'Connor was steamrolled by veteran Brumbies winger Clyde Rathbone while making a try-saving tackle and left the field to be checked for concussion.
He looked set to return at the 55-minute mark but was frustratingly over-ruled by the team doctor, who benched him for the remainder of the game.
Around the same time Beale hurt his left shoulder while making a tackle and while he played on until the final five minutes he clearly struggled.
The Brumbies were quick to close their one-point halftime deficit, through a penalty strike by Christian Lealiifano and the momentum of the match quickly swung their way.
As the home side's injury toll mounted the Brumbies grew in stature.
After skipper Ben Mowen showed his pace to scoop up a loose ball and charge to the line, they grabbed their bonus point with a fourth try in the 74th minute, scored by replacement back Robbie Coleman.