Jeremy Renner was attempting to save his nephew before he was crushed by a 14,000lb snow plough – leaving him with 30 broken bones.
New details from the horror accident reveal that the Marvel actor, 52, was trying to stop his Pistunbully snowcat from hitting his nephew on New Year's Day in Nevada.
Reports say the vehicle's parking brake, which could have prevented the horror ordeal, was not engaged - causing it to slide sideways, rolling over Jeremy's body.
