EE WAS OPERATING HYDRO SEEDER. HE STATED THAT HE WAS CLIMBING GRADE WHEN MACHINE POWERED OUT. EE PLACED THE MACHINE IN NEUTRAL AND IT STARTED ROLLING BACKWARDS. EE PANICKED AND JUMPED OUT. THE MACHINE ROLLED APPROX. 40 FT. AND STOPPED. EE HAS A SLIGHT HAIRLINE FRACTURE OF HIS TIBIA.