The invention relates to a harness safety system that can be used while riding, for example, a skateboard, a bike, rollerblades, etc. through on a flat base. Specifically, the invention comprises a flat base having a free-running cord and harness hanging therefrom that allows the rider to proceed on a flat base optionally comprising a start deck, obstacles, jumps or combinations thereof while retaining tension on the rider throughout the process. and arresting the rider's fall, thus preventing the rider from serious injury.