Port Adelaide's Darcy Byrne-Jones pulled off one of the most stunning game-winning goals the AFL has seen in some time, with an across-the-ground kick with just seconds on the clock the defining moment in a one-point win over Hawthorn.

The Power trailed by 28 points at the final break and managed to keep the Hawks to just the one behind for the final term, with two goals each from Willie Rioli and Byrne-Jones in the fourth quarter cutting the deficit.

Rioli's second major of the quarter came with just 30 seconds on the clock after winning a free kick from 50 metres out before taking no time and slotting a long-range goal to give the Power a final breath with five points separating the twp sides.

The final centre bounce went in favour of the Power, with Zak Butters - who had a sensational final term - launching the ball to the centre of his side's attacking 50. The ball spilt over the back of the pack and landed with Hawk Karl Amon, who dropped possession following a tackle from Jed McEntee.

Bryne-Jones was first to the ball and kicked it off the ground with his right boot, with the ball sailing over the line from a tough angle to ice the comeback win.

"He being the house down, and he brings Port Adelaide back from the clouds to claim the most extraordinary win," commentator Alastair Nicholson said on the broadcast if Byrne-Jones' match-winner.

The goal left just two seconds on the clock for the Hawks to potentially respond, but the final siren sounded immediately after the centre bounce.

The win saw the Power come from 41 points down to claim their seventh win of the season, with Butters, Dan Houston and Jason Horne-Francis instrumental in the victory.

Butters had 16 disposals, seven contested possessions, five clearances and five inside 50s in the final term alone.

Blake Hardwick was Hawthorn's best performer, booting five goals before being swung to the backline in the second half to help try and stave off the Power.

The loss for Sam Mitchell's side denies the club of a third straight victory, with the Hawks sitting in 15th on the ladder as a result of the defeat.

Port Adelaide WON BY 1 POINTS
Adelaide Oval