An employee was unloading a rack of intravenous (IV) pumps from a truck when two of the four wheels became stuck on the lip of the truck ramp. Two other employees came to assist. One employee went to raise the ramp while the other two lifted the rack to free the wheels. The rack became free and began to go down the ramp and into the loading dock. While the rack was moving down the ramp, it turned sideways and flipped over, landing on the injured employee. The injured employee was hospitalized with a fractured T12 vertebra.