A Payson man died Monday after sustaining head injuries in a freak fall from the back of a moving truck, according to Payson police reports.

John Johnson, 24, was pronounced dead on arrival at Mountain View Hospital after a single-vehicle accident at 600 S. and Third East. Johnson was sitting on a tool box in the bed of the truck that was traveling west on Sixth South. When the truck turned on Third East, the man slid off the tool box and out of the truck and fell to the ground.The driver's name is being withheld while officers continue their investigation.