Brisbane Roar were leading 2-0 against Melbourne Victory thanks to goals from Massimo Maccarone and Brett Holman, before Troisi sparked a fightback with a bullet from range.
In the 83rd minute, Troisi unleashed a piledriver straight into the top corner.
"To be honest I think it's the first time I've shot outside the box this season," Troisi told Fox Sports post-match. "I've got a good strike on me when I connect. I should do it more often this season."
Unfortunately, that was as good as it got for Melbourne as they fell to a 2-1 defeat which leaves them fifth in the A-League.
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