Lost in a house

I was lost in a house. Old people sat in rooms while I looked for the exit. The house was filled with carpet, as if it was a carpet store. I ran up and down metal stairs. I ran up and down stairs made of carpet too. I couldn't find a window or a door. I asked an old lady where the exit was and she said it was probably somewhere but she forgot where. I was afraid what would happen if a fire would start to blaze in this huge house and I got frantic. I wanted to get out of the house but I couldn’t find the exit. At one point I entered the cellar and I saw a metal door there. It was locked with a thick iron chain. I poked my arm outside the door and waved at people in the streets. Someone said ‘its locked.’ I just couldn’t leave the place.