Abstract: On June 26, 2003, Employee #1, an oil field operator, was taking readings from a 2-inch Floco Meter, Model F-500, located within the piping manifold at ground level on a down-hole crude oil production pump (rocking horse). The pump had just been put back into operation after a maintenance crew hydro tested the oil gathering system, downstream of the pump. Employee #1 leaned over to check and record the flow rate, the meter exploded, shattering Employee #1's right leg. He was hospitalized and treated for vascular damage, a fractured fibula and tibia. Employee #1 was released six weeks later. During a detailed investigation is was noted that the maximum working pressure for the F500 series meter is 500 psig and the manufacturer calculated that pressures exceeding 2000 psig would cause the meter to fail.