Abstract: At 11:30 a.m. on August 18, 2017, an employee, owner, was attempting to take a Caterpillar 303.5E CR excavator off a trailer that was attached to a Ford F350 pickup truck. The pickup truck and trailer were parked on a sloping road in an unincorporated area. There was no blocking/chocking of wheels of the tires of the trailer and pickup truck. While the excavator was being moved on the trailer, the pickup truck's back wheels lifted approximately 1 inch off the road; this caused the pickup truck and trailer to roll down the road approximately 400 feet or approximately 4 seconds until the trailer was stopped by trees. The trailer crashed into the trees and the owner was ejected from either the trailer or pickup truck and crushed under the trailer. The owner did not jump off the trailer or pickup truck while the trailer and pickup truck rolled down the road.