There's no time, really, to react to that death-defying leap through the flames. Ordinarily, Zack would be impressed and maybe worried - now he's just worried, and not even mostly about whether or not Tifa might've gotten scorched, just then. It's hard to even hear her this close, beneath the enormous, terrifying groaning of the Plate overhead.

Something huge crashes to the ground not all that far from them, sending a rolling wall of flames skyward and making the ground rumble underfoot. But rather than freezing Zack to the spot, that at least seems to galvanize him. He grabs Tifa's hand and pulls her after him.

"The mountains! We need to head that way - the caves are our best bet!"