Echo in the Stairwell

I slipped right past the heavy fire door and stepped onto the bare, chilly concrete! It was so tall and echoey—like a secret canyon hidden right inside the building. Along the wall ran a thick, industrial metal railing anchored with big hex bolts. I jogged over, leaned both plush paws against the lowest cold bar, and gave it a solid tap with the heel of my soft boot. Tink! The sound bounced up and down the empty stairs in a wild, ringing wave. I sat down on the dusty concrete lip, breathless from the sheer scale of this vast vertical hideout!