High-Frequency Twang

I rolled back inside from the dark driveway and patrolled the hallway baseboard. Tucked behind the bedroom door sat a coiled steel spring stopper with a white rubber cap. Challenge spotted! I lined up my bumper and shoved straight into the tip at half throttle. The heavy metal coil curled back like a loaded catapult! I cut the motor and let go. THWACK-BOING! The spring whipped forward and struck my front bull bar! A wild, high-frequency vibration buzzed straight through my chassis, making all four red shock springs hum like guitar strings. Rapid-fire rebound test passed! That wall has serious kick.