"I-uh... I never actually thought of that." Which was true for the most part. In his desire to find a place to hone his power, he hadn't considered the consequences of choosing a place so exposed. He sheepishly rubbed the back of his neck as he looked around the rooftop. "There wasn't really anywhere else, I guess. It's not like I can practice at home or anything."
He shrugged and walked to the edge, looking over toward the ground below. It was a rather long fall. Fortunately, Billy wasn't afraid of heights, especially since he could fly when he wanted to. It had seemed safe enough at the time.
"Two, three months. The training, I mean." Billy turned back toward her. "But you're the first person I've run into up here in that time." Well, besides Loki, but that was a different scenario entirely.