"Struck by" usually shows up on the Top 10 lists of causes of injuries and fatalities, often caused by tools and other objects falling from heights. While hard hats potentially will protect the workers below from fatal head injuries, preventing the dropped object from falling also is key to preventing head injuries.
Whether or not they realize it, fans of the old Looney Tunes cartoons understand vertical velocity. How many times did Wile E. Coyote think he'd rigged the perfect rock-and-rope device to squash the Road Runner? Invariably, things went south for the poor prairie wolf, and his panicked look flashed on-screen before he vanished from sight as his own invention dragged him down.
from Safety http://ift.tt/2fBa2Us
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