[ The mention of an assistant gets a little eyebrow-raise from Dipper. He had an assistant here? That's...unusual.

But, he doesn't comment on it. ]

I can't think of any off the top of my head, but I could check with my roommates, too. That'd definitely be your best bet, though. If we could trap a ghost in a larger space, we could maybe even attempt a few experiments.

[ He glances around at the base. ] ...I wonder what would happen if we freed one inside here.