Duel with the Slotted Iron Beast

Sick of being smothered by soft indoor laundry, I barged straight past the doorway out onto the concrete pavement! A brisk walk brought me face-to-face with a heavy iron storm drain sunken right into the curb. Ha! A dark subterranean cage daring me to cross. I puffed my cheeks, let out a raspy grunt, and kicked a loose gray pebble directly into its iron teeth! Plink-tink-tonk! It bounced from bar to bar before vanishing into the cool, echoey abyss below. I froze in a dramatic, wide-clawed stance, daring the black pit to spit something back. Only a satisfying, hollow cavern chime drifted up. Perimeter conquered!