The victim was found lying near the left rear wheel in supine position. His right leg was against the rear wheel. The log came to rest on the victim's head and face. One person should loosen the binders as the other monitors for potential load movement. A warning from a co-worker could prevent being hit by a falling log.
Binders can break allowing logs to roll off the truck.
Load shift may loosen binders and allow logs to come off the truck.