Hm. ...That's interesting. She'd still have to have contact with the atoms directly underneath her feet to, you know, not plummet to the center of the earth. It would take an impressive amount of control -- or maybe she has some sort of latent self-propulsion power like we do.

[Phantom Girl gives a small shrug as they change course towards a rather tall building.]

So... did she ever take anyone along for the ride?