[ that's his favorite student. ]

...Yes. For the time being.

[ despite all this, he's happy enough to launch into an explanation: ]

The portal that drew us in is naturally-occurring, and impossible to totally tame. It's really quite fascinating--

But we can't aim it back towards our universe like a cannon - it could take a great deal of time and effort to nudge it in the right direction. [ he mimes aiming something through the air. ] And there are possibly over a hundred people here waiting on just the same.

I've had a several weeks already to look into it.