Gold Coast fullback Keano Kini conjured up the attacking play of the season to sink Brisbane 28-23 and leave the premiers' title defence in ruins.
A 73rd-minute Adam Reynolds field goal appeared to have taken the Broncos to victory at Suncorp Stadium on Saturday, before Kini, from 55m out, chipped ahead and snatched the ball from Reece Walsh's grasp to race away in the 77th minute.
Kini then saved a last-gasp try attempt by the Broncos when he knocked the ball dead to secure one of the club's great wins.