An employee was using straps to secure a load inside a transport trailer. The employee was standing on a stack of finished goods that was three pallets high. Each pallet was 16 inches high. He was walking from the stack of three pallets onto a stack of two pallets when he lost his balance and fell onto another stack of finished goods (that was two pallets high) and then landed on the floor of the trailer. The employee was hospitalized with fractured ribs.