Staff saw a leg in the afternoon

A staff told me he saw a leg The leg appears very often. I work graveyard shift. Very often I tell myself I must be sleepily. The leg only appear once and it is hard to confirm the thing I saw. A young staff rode the reach truck pass the corner of the service lift. He only saw a leg. He told me about it. I told him I saw the leg many times. But since no one saw it I just keep quite about it.