It doesn't show on his face, but internally he's breathing a sigh of relief. He's not quite sure how that worked out, but until he can get some more concrete answers he'll take it.

"It's alright, ma'am, I've got y--" And then she starts talking and he recognizes the voice in a heartbeat.

"Harley?" The number of questions just doubled. He's setting aside the fact that she clearly just threw herself off a building to get her attention for now. Clark's known her long enough to know that it's the sort of thing that just occurs to her, and she'd probably do something like that again regardless of what he says. It isn't going to stop them from having a talk about that later, but for the moment he's going to prioritize getting a handle on things.

He banks, flying towards the nearest rooftop and setting her down.

"So. Considering you can actually see me, I'm going to assume you know more about what's going on than I do. Care to explain?"