You didn't mean to go in. Youd found the facility abandoned, and, having no idea what it was, you'd went in. Maybe it was a abandoned daycare or something, and wouldn't that be cool? You found a large door and twisted the handle to open it.

Then the 200-inch concrete door closed behind you. The ward in front of you looked like... A playground? There was bright foam everywhere. Blood on the walls, and flickering lights. Total horror movie type.

You tried clawing at the door, and it wouldn't open.