She watched him casually as he went from disk to ground, and it turned into what appeared to be an ordinary piece of metal. "Time travel?" she asked, tilting her head. "Try dimensional travel. This isn't even my world." and by the sounds of it, it wasn't his either. "Bat cave...?" she asked, blinking.
Why did that sound familiar to her? "You mean, like...Batman?" she'd read about him, apparently from the same world she was from. Or one like it. Which meant this guy had to be from her world. "We must be from...sort of the same dimension" she said with a shrug. "Where I'm from there's only a few heroes that have emerged. Green Arrow, Angel of Vengeance, Red Blue Blur are the ones I've heard of." Either because she met them, or they were on the news. It was hard to miss vigilantes.
Considering she could have been one herself if she had stuck around, it made sense to watch out for them.