Watch: Cavani's thunderous strike kills Barcelona's comeback bid

And that's the sound of everyone in Paris breathing an enormous sigh of relief.

Barcelona, looking to overturn a massive 4-0 deficit from the opening leg of its Round of 16 tie against Paris Saint-Germain, looked on the verge of accomplishing just that after Lionel Messi's penalty early in the second half of Wednesday's tilt gave the Blaugrana a 3-0 lead.

PSG was rattled, and the Camp Nou was rocking.

And then Edinson Cavani killed the comeback with one thunderous swing of his right leg. It's 3-1 on the night to Barcelona, but Luis Enrique's men now need to hit the back of the net three more times to make mission impossible a reality.

It's not happening.