"Ah. Still new then," Brian said, smiling faintly. "Don't worry, it does get better. As for healing -- well, can't say for sure. Might just not be that powerful yet."
He looked around, searching for an alcove they could escape to temporarily. Ferran seemed keen on leaving quickly, and it wouldn't do to simply disappear in the middle of a subway station. Talking about powers here was one thing -- it was busy and crowded and noisy and he doubted anyone would overhear, or know what they were talking about. But actually popping out of existence was another. And there were cameras.
Finally spotting a side hallway, Brian jerked his head in that direction. "C'mon. I'll show you how easy it'll be once you've got the hang of it." He began to walk, expecting them to follow.