An employee was brazing when her foot got caught in a brazing line, resulting in her falling and hitting her left hip and knee. Approximately four hours later, she was at a different work station cleaning cooler doors. When she went to leave that area, she tripped over an airline and fell onto her left hip, knee, and elbow. Both of these incidents resulted in her falling onto the concrete floor on her left side. Later, when returning from her lunch break, she fell in front of her vehicle and landed on her left side. The employee suffered a fractured left femur and hip, resulting in hospitalization.