Beware of a Lightning-quick bounce back.

This is what the Rangers face in Game 2 of the Eastern Conference Final against Tampa Bay Friday night at the Garden.

The Lightning, the two-time defending Stanley Cup champs, appeared calm, cool, collected and unaffected by the early deficit created by Wednesday night’s 6-2 Rangers win as they conducted a spirited off-day skate Thursday at the Garden.

There was a distinct “been-there, done-that’’ vibe emanating from the Lightning, beginning with their coach, Jon Cooper, who appeared completely comfortable in his skin despite the jarring loss in the opener.

Cooper, who’s close with Rangers coach Gerard Gallant, was quick to praise the Blueshirts for their performance and quicker to promise his team will be a lot better in the next meeting.

As the Lightning, who are now 0-4 against the Rangers this season (including the Game 1 loss), worked through their afternoon skate, the Garden scoreboards were still displaying the 6-2 score on both ends of the ice as if Wednesday night’s game was still live.

Coincidence … or a touch of gamesmanship?

We’ll leave that to your interpretation.

What needs no interpretation is the confidence the Lightning carry into Game 2 despite the lopsided number they were handed in Game 1 — the six goals were twice as many as Tampa Bay yielded in its 4-0 sweep of Florida in the previous series.

“We as a group are pretty good at self-correcting,’’ Cooper said after the Thursday skate. “And guys, they take losses personally. [Wednesday] night especially, the way the score got out of hand it affects the guys. I can’t guarantee the result, obviously, but I expect better from us [Friday].’’

If history has any say in the proceedings Friday night, the Rangers may have cause for concern. The Lightning have won their last 17 playoff games after a loss.

“That’s not something you want to fall back on,’’ Lightning defenseman Zach Bogosian said Thursday. “You can only say that when you execute it. That’ll be for us to do [Friday] night. Experience is a huge thing this time of year and we have a ton of it, so we’re a confident group.

“For whatever reason we’ve been able to turn the page really quick and this is going to be no different for us. The majority of us have been around a long time and we know what we need to do to rebound and regroup. We had a good practice [Thursday] and we’re looking forward to [Friday] night.’’

To the credit of the Tampa Bay players and Cooper, not one of them blamed the nine-day layoff without a game for Wednesday’s loss.

“That’s in the past — we’re right back in the fight, so we’re looking forward to it,’’ Bogosian said.

“[Wednesday] night was not what we wanted, but we know what we have in this room and what we can do,’’ Tampa Bay winger Nick Paul said Thursday.

Cooper provided the calming voice of reason.

“It’s Game 1, we’ve been through this before, we’ve won series when we’ve lost the first game and we’ve won series when we’ve won the first game,’’ Cooper said. “There were things we did [Wednesday] we hadn’t done a ton of in the previous two rounds. The Rangers have some dynamic players. If you give them an inch, they’ll take a mile … and they did that. Give credit to them. They’re a great team. Turk [Gallant] has got them rolling and they compete hard. They didn’t fluke their way to where they are in these playoffs.

“But in saying that, we have better in us.’’

The Rangers’ task: Beware of the Lightning-quick bounce back.