You are under a bridge and see an I-Beam with a rope on it. The rope is frayed, and it looks dirty and polluted, like it has been there a long time. It is a short length of rope, and you ask yourself why it is there, as it would be difficult to tie the rope to where it is positioned without falling. Perhaps, you think to yourself, the person who put the rope there was not afraid to fall, and you can only think of one reason this would be.