Blackhawks defenseman Nick Leddy raced around Kings defenseman Matt Greene, put his head down and whistled a backhander past goaltender Jonathan Quick. Chicago’s Ben Smith then slipped behind the Kings’ defense and snapped a shot by Quick.

Uh-oh, one of those nights?

Yes, of course, it was.

The Kings simply followed their customary Stanley Cup playoffs method of operation, trailing and then rallying when it mattered most. This time, they erased a two-goal deficit and took a emphatic 6-2 victory from the Blackhawks in Game 2 of the Western Conference finals Wednesday.

Leddy, in the first period, and Smith, in the second, put the Blackhawks right where the Kings wanted them. The Kings scored three times in an electric 5-minute, 50-second span stretching from near the end of the second period to the beginning of the third.

Justin Williams, Jeff Carter (power play) and Jake Muzzin (power play) scored to give the Kings a 3-2 lead. Tyler Toffoli then made it 4-2, and Carter scored twice more for the Kings’ first three-goal game in a single period in a playoff contest since Tommy Williams on April 14, 1974.

Now the best-of-7 series shifts to Staples Center for Games 3 and 4 on Saturday and Monday.

Game 5, now necessary, is next Wednesday at the United Center in Chicago.

“It was all us in here,” Kings center Jarret Stoll said when asked what coach Darryl Sutter said to fire up the team during the second-period intermission, when it showed signs of life but still trailed the Blackhawks 2-1. “He doesn’t have to say much in situations like that.”

Perhaps that’s why the Kings are so resilient, so difficult to defeat.

Maybe they’re just better prepared when falling behind after becoming only the fourth team in NHL history to rally from a three-games-to-none deficit to win a best-of-7 series when they ousted the San Jose Sharks in the first round of the playoffs.

The Kings then rallied from a 3-2 series deficit to beat the Ducks in the second round.

“I still think we can play better,” center Anze Kopitar said after the Kings seized home-ice advantage by defeating the Blackhawks for only the second time in the last 10 regular-season and playoff games. “To get four wins against this team, we’re going to have to play better.”

Said Kings team captain Dustin Brown of sending the Blackhawks to their first loss in eight home games during the playoffs: “I think this is a huge game for … our psyche. Kind of like slaying the mythical dragon.”

Defensive lapses led to the goals for the Blackhawks’ Leddy and Smith, but the Kings’ had plenty of other issues during the game’s first 21:40. For instance, they marched to the penalty box in relentless fashion in the opening period, taking four minor penalties.