KICKING the winning goal against your team's fiercest rival is a fantasy of every young footballer.

Essendon draftee David Zaharakis did it on Anzac Day against Collingwood; now the Sydney Swans' Kieren Jack has lived the dream.

With his side trailing West Coast by less than a kick deep in time-on, the 21-year-old mopped up Eagle defender Eric Mackenzie’s errant kick and split the middle from 35 metres to send the ANZ Stadium crowd into raptures.

The son of rugby league legend Garry Jack said he’d scored the winning try for his under-14 rugby league team but Saturday night’s goal was his first game-winning effort in his Australian football career.

"I think Mickey O’Loughlin’s a bit upset; he was free in the goal square apparently. If I had have missed it, I’m sure I would have heard about it," a pumped Jack said in the rooms after the game.

"I didn’t think about it. I just picked it up and saw the goals and just kicked it. It was through instinct, I suppose, and that’s probably why I missed Mickey O.

"I just had eyes for a goal, so I had to kick it."

Jack’s magic moment wasn’t his only highlight for the night but it was a lot less painful than his earlier heroics, which saw him vomiting on the field after taking a heavy hit in a marking contest.

The young midfielder said his bravery was nothing out of the ordinary. Rather, he was simply doing what was expected of senior Swans players.

"It was just one of those things where when it’s your time to go, you’ve got to go," he said.

"With the culture we’ve got set up, if you want to play senior footy that's what you’ve got to do.

"It was my time to go and I did it."

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