Ratcheting Dial

I scrambled down the back step straight into the open air. Right on the stone flags lay a heavy green hose nozzle with a ribbed dial on its nose. Solid plastic teeth! I charged forward, threw both arms around the snout, and twisted with my whole body. Clack! A sharp, heavy snap rattled beneath my palms. I froze, eyes wide. Hidden gears inside! I dug my heels into the damp rubber hose and shoved again. Click-click-CLACK! The arrow jumped to the next groove. A crisp mechanical pulse right in my grip.