Spring Bass Solo

I slipped right past the cracked patio door into the cool evening breeze to check out the backyard! Right down at boot level on the doorframe, I spotted a shiny coiled spring doorstop with a white rubber tip. Curiosity won instantly! I planted both boots firmly on the textured concrete, wrapped my fingers around the rubber cap, pulled it back as far as my arms could stretch, and let go! TWANG-G-G! The metal shuddered with a massive, wobbly bass groove that vibrated all the way up through the floorboards! Who needs an electric guitar when the patio has built-in slap bass?