This question is to the experts knowing all the tricks and quirks of the engine. Last mission of Thief 1 is Maw of Chaos. I was always curious how Garrett escaped it after exchanging the Eye and destroying portal. Usually there is an objective for that, but in this mission there is none. So I ask to destroy the portal and then wait 4-5 min to emulate time spent on watching the ritual. And then return to starting point. I wonder is it even possible?