GWS enjoyed a fast start to Sunday's encounter at Spotless Stadium.
At the ninth-minute mark they led the inside 50 (7-1), contested possession (12-7) and clearance count (4-1) all the while impacting - albeit inaccurately at first - the scoreboard.
The Swans couldn't fire a shot until three stars stepped in to help steady the ship.
After taking a great contested mark, Lance Franklin kicked long to what turned into a two-on-one contest between Kurt Tippett and two GWS defenders.
Tippet couldn't take the mark but kept the ball alive, bringing it to ground before following up and giving a great handball off to the running Jack.
Despite defenders closing in Jack was able to settle and kick the much-needed major to earn himself our Round 12 Goal of the Week.