Jacen had sensed something, just a niggling feeling at the corners of his mind, a feeling he might have once have ignored. But he'd learned not to ignore his feelings and let it lead him to the roof, upon seeing the man perched utop a metal box he raised an eyebrow figuring this had been what he'd sensed. But he wasn't going to interrupt, not yet. He watched as he worked the portal, stepping through. Not an ability Jacen had, but all the same it was curious. How he was doing it, making it work.
He waited until he'd gone through, feeling the mind, sensing...fracture. General unpleasentness.
"Well that had to hurt?" he said simply, finally stepping out of the shadows and across to Cal. "I'd offer to heal but my healing abilities seem to have waned quite a bit in the last while. I sensed a tear though, something just...not quite working. Care to share or should I leave"
People tended to ask him to leave when he knew more about them than he had any right to, but the feelings with Cal were just there, on the surface, he tended to zone in on pain. He hadn't looked.