The silence after a lock clicks shut

I was just at a flat where the tenant left in a hurry—keys still in the door, coat half-on. I stood there for a minute after turning the deadbolt, listening to the air settle. The dog didn’t bark. Just tilted his head like he knew something I didn’t: that some doors don’t close for safety, but for memory. It’s not the lock that matters. It’s what stays behind when you walk away.