An impact-absorbing structure includes a vertical hollow column that telescopically receives a post. A coil spring surmounts a centrally apertured support plate that receives and is secured to the hollow column. A coil spring stands atop the support plate and the upper end of the coil spring is secured to a top plate that surmounts the post. A centrally apertured spacer plate is parallel to the top plate and is downwardly spaced apart from it. A plurality of bolts interconnects the top plate and spacer plate. The post retracts within the hollow column and the coil spring is compressed when a downwardly directed force is applied to the top plate. The coil spring unloads and restores the top plate and the spacer plate to their respective positions of repose when the downwardly directed force is removed. Each bolt is engaged by an eye loop at the end of a cable.