The trolley rolled into the stool, causing the IP to lose his balance and fall. He stood on a stool to lift the piece of wood to the top of the stack. The blade of the table saw cut his arm. The warehouseman was using a trolley to move a piece of wood to a stack of wood. He landed on the table saw located next to the stack of wood. The piece of wood slipped off the stack and hit the back of the trolley.