He does move fast! He doesn't shout again, his throat starting to ache already, but he does run through the lobby, almost slamming into the closing doors when he finally gets there. Just a second too late.

"Dammit." He takes a deep breath, steadying himself before he taps the elevator and waits. He'd take the stairs, but he knows she came this way, so this is the way he's following, and he considers the directory for just a moment before he hits R. He doesn't want to walk through these dreary apartment hallways if he doesn't have to.

But if there's nothing on the roof, then he'll go down to 2 next, and start testing to see if any of the apartments are open.