It was strange to think of, but the mention of other worlds was something he'd already heard of. That made it no easier to grasp now when faced with undeniable evidence. "Not likely." He hadn't properly known a Castiel in his world, but Gabriel. That was something familiar and yet not. Though, that was something to ponder on later. "This sort of thing is common, then?"
He glanced back outside for a moment, tempted to ask if they could move there, but deciding it wasn't that big of a deal. He spent plenty of time inside. He had even yet bothered to find someone to remove the large window of his own apartment. Looking back at Duma gave him pause and he watched him for a moment, something about the position of someone else. Young. Lost.
Stepping over in front of Duma, he paused before sitting, whether that meant in the floor or not. It didn't really matter to him. "You're troubled. I can not feel you, but that much is obvious." It wasn't his place to ask, and he certainly had his share of things that weighed on him as well, even if he'd long since learned to be calm during those times. Still, he hoped there was a sort of open invitation there.