How am I here?

You fell through the floor and expected to be in the original Backrooms. Oh were you mistaken. You fell deeper than needed to. The 1st thing you do is explore or investigate the place to find a item that will help you survive. You find nothing, not even a drop of water or a crumb of bread, a millimeter of sunlight or a leaf from a plant. You decide to check out the window. You realize what level this is. You stand there and watch for what feels like hours or even days. You couldn't tell how much time passed, nor how long you were staring through the window. It was useless anyways, so you thought. You decided to walk around the entire level, hoping to find something you missed. ...