You walk through the passage and immediately you are pulled through it. You are falling. You are very happy you put on that hat because without it you almost certainly would have fallen to your death.

You fall on top of one of several very tall skyscrapers. You're abolutely fine, just a bit shaken and dizzy from the fall. You'll get over it soon, plus those wounds have healed a bit.

You see a hatch in the floor that probably leads to the floor below, a fire escape stairway, some cinder blocks, two rope hooks near the edge and a few other skyscrapers that are also extremely high.

You also see a person in one of the windows of a nearby skyscraper.