Abstract: On May 13, 2003, Employee #1 was working at Boomers!, a family amusement park with batting cages, go-karts, miniature golf, arcade and snack bar in Santa Maria, California. Employee #1 had been employed at Boomers! for approximately 2 weeks before the accident. A go-kart spun out of control, struck a guardrail head-on and became stuck. The kill system was activated, which reduces the spark to all go-kart engines thus slowing the go-karts so they can be directed into the pits while the stuck go-kart was serviced. Employee #1 stepped onto the track to the side of the go-kart opposite the oncoming traffic and began to service the stuck go-kart. Go-kart Number 10 reportedly was not affected by the kill system and hit the stuck go-kart causing it to strike Employee #1. The kill system worked on all go-karts including Number 10 at the time of the inspection. Employee #1 received a sprained lower left leg and was treated and released by the Marian Medical Center emergency room.