BOTTOM-side Hamilton Kangaroos did what no other team has been able to do upsetting the previously unbeaten Warrnambool by a point at Melville Oval.
The Kangaroos led by 18 points at half-time but the Blues seized the momentum with three goals to nil in the third term to lead by two points at the last change.
At one stage in the final quarter the Blues were 14 points clear of the Kangaroos but the home side rallied to take the lead again.
Warrnambool had chances to win the game at the death, having the last two scoring shots - behinds - as they were defeated 12.7 (79) to 11.12 (78).
The Kangaroos' triumph, the best of their 27-game history in the Hampden league, further compacted the ladder. The Kangaroos remain 10th but just a game behind fourth-placed Portland at the half-way point of the season.
Port Fairy jumped into the five after a 64-point triumph over Cobden - its biggest win since 2005. Full-forward Gary Robinson kicked nine goals and centre half-forward Sam McCartney three.
Port Fairy seemed to have the game in its keeping at half-time, leading by 27 points but Cobden surged to within five points in the third term.
But Port Fairy kicked 10 of the last 11 goals of the match to win 18.11 (119) to 8.7 (55).
Second-placed Koroit closed the gap on Warrnambool with its 22-point win over Portland at Hanlon Park while Camperdown jumped back into the top-five mix with a 39-point triumph over Terang Mortlake at Terang.
North Warrnambool Eagles claimed a 29-point against South Warrnambool to consolidate its grip on third spot.