The explosion of the Guard station has destabilized the entire area, and the ground is collapsing into the Undercity beneath them faster than the rebels can outrun it. They're still being pursued too; chased from the skies by the few remaining Black Guards who'd managed to escape the station with their wingpacks, and it's certainly only a matter of time before the Recognizers arrive.
There's a cry from behind Quorra, and she looks over her shoulder just in time to see another of her comrades fall into the chasm. Yori gives her no time to mourn, though, grabbing her forearm and yanking her forward almost hard enough to pull her off her feet. "Run, dammit, don't look back!"
They've almost made it across the bridge to the lightrunner when two of the guards set down on them, one on either side, boxing them in. They're both exhausted, circuits flickering with low energy, but Quorra activates her katana and Yori extends her spear and they stand, back-to-back and faces set.
They give no quarter.
When it's over they sink against each other, clinging to one another in the aftermath of battle, a quiet moment that they cannot afford but that they need, desperately, and damn anyone who comes for them.
They are survivors.