The Brumbies moved back into the top spot in the Australian Super Rugby conference when they beat the Force 17-28 with a bonus point.
The Reds had provisionally overtaken the Brumbies earlier in the Round but the bonus point victory puts the men from Canberra back on track.
The Brumbies play the Waratahs in Sydney next weekend and then finish the regular season with a match at home in Canberra against the Blues.
The Force who are already out of the running for the play offs play the Blues in Auckland next weekend and then finish their season against the Crusaders in Christchurch.
The Brumbies blew the Force away in the first half and secured the four try bonus point before half time in the 37th minute while keeping the Force off the scoreboard.
The Brumbies were however complacent in the second half and allowed the Force to score three tries which got them to within 8 points before Zack Holmes extended the gap with a penalty.
Earlier the Brumbies looked set for a comfortable win when they led 22-0 at half-time, spoiling what local fans hoped would be a farewell celebration for retiring Force veteran Nathan Sharpe, playing his 161st Super Rugby match.
It was Sharpe's final home game, but the chances of a fairytale result quickly turned into yet another nightmare in a horrendous season for the Force.
The Brumbies put their first try on the board within three minutes, through Jesse Mogg, and by half-time had already earned a bonus point and should have had the win in their keeping after four unanswered first-half tries.
Mogg, Zack Holmes, Ben Alexander and Henry Speight all crossed the Force line as they stunned the home side, and could have been much worse, with three conversions and a penalty missed by Holmes.
However, early in the second half the Force rallied with successive tries through Nick Cummins, reducing the deficit to 12 points.
The margin was cut to eight when Toby Lynn dived over in the 69th minute and an upset loomed, but the Brumbies had too much to play for and steadied through a Holmes penalty.
Brumbies skipper Ben Mowen was satisfied with another win, despite the shaky second half.
"We lost a bit of momentum early in the second half and the Force were playing really good footie," he said.
"The way we played in the first half showed what we are capable of and we just need to do it more consistently."
Force skipper David Pocock, who is yet to announce a decision on his playing future for 2013 and beyond, lamented his team's poor first half.
"We showed a good resolve to bounce back after half-time, but we gave away too much in the first half," he said.
"We gave away some tries where they went straight through us and it was pretty disappointing.
"It is disappointing to send Sharpey off on this note."
Final Score Force 17 (0) Brumbies 28 (22)
Tries - N Cummins 2, Toby Lynn
Con - D Harvey
Tries - J Mogg, B Alexander, H Speight, Z Holmes.
Pen - Z Holmes 2
Con - Z Holmes
Referee: Ian Smith
Assistant Ref 1: James Leckie
Assistant Ref 2:Ed Martin
TMO : George Ayoub
1. Pek Cowan,2. Nathan Charles,3. Salesi Ma'afu,4. Toby Lynn,5. Nathan Sharpe,6. Richard Brown ,7. David Pocock (c),8. Matt Hodgson,9. Josh Holmes,10. Ben Seymour,11. Napolioni Nalaga,12. Rory Sidey,13. Will Tupou,14. Nick Cummins,15. Alfie Mafi
Replacements : 16. Elvis Taione,17. Tetera Faulkner,18. Salesi Manu,19. Phoenix Battye,20. Lachlan McCaffrey,21. Brett Sheehan ,22. David Harvey
1. Ben Alexander , 2. Stephen Moore , 3. Dan Palmer , 4. Scott Fardy , 5. Sam Carter , 6. Peter Kimlin , 7. Michael Hooper , 8. Ben Mowen (c) , 9. Nic White , 10. Zack Holmes , 11. Jesse Mogg , 12. Pat McCabe , 13. Andrew Smith , 14. Henry Speight , 15. Robbie Coleman
Replacements , 16. Anthony Hegaty , 17. Ruaidhri Murphy , 18. Leon Power , 19. Ita Vaea , 20. Ian Prior , 21. Tevita Kuridrani , 22. Cam Crawford