The last time the two teams played, FC Dallas scored three goals in four second-half minutes that Minnesota United coach Adrian Heath called "madness."
That was Labor Day weekend at Allianz Field.
They'll meet again Monday night in a first-round MLS Cup playoff game, this time in suburban Dallas in a meeting of third- and sixth-place teams.
The Loons won the first time the teams played this season, 2-1 at Dallas in late May.
The next time, Loons defender Michael Boxall's own goal triggered the avalanche after he tried to redirect a crossing pass in the 55th minute. Alan Velasco's curling strike from the edge of the 18-yard box 92 seconds later beat Loons goalkeeper Dayne St. Clair to the lower right corner. Then Jesus Ferreira's flicked-on header from inside the 6-yard box went upper right corner in the 58th minute.
And it was all over, 3-0 in the Loons' first game without veteran center back Bakaye Dibassy. He suffered a season-ending ruptured right quadriceps three days earlier at Real Salt Lake.
"If you look at the game, we had a mad five, six minutes," Heath said after his team's 2-0 home victory over Vancouver secured a playoff spot. "You look at the 90 minutes as a whole, there was nothing in the game [for FC Dallas]. In fact, we probably had the better chances and probably had more of the possession and we were the better team that day.
"But goals change games, you know how we say it. If we do that again, we won't be going very far."