Langton and Topher in “The Attic”

What do we know about the attic?

No one comes back, Boyd.

But why? What do they do to them in there?

I don't know: experimenting, torture. They're testing the limits of the human mind. The brain is kept in a fear induced adrenaline fueled overdrive state like a problem you can't solve. Either the nightmare lasts forever or...

Or it doesn't last at all.