So I was watching this video, and got to the part where this guy and girl are discussing and demonstrating whose method of peeing off the portaledge is scariest. Then I of course thought to myself, "What if there was some unseen person down below?" I don't even want to imagine what it'd be like to be starting your big wall climb then all of a sudden getting caught in yellow rain. Or worse, catching someone's stool in the helmet ("Rock!"). Does everyone bag their business on a big wall and haul it the rest of the way with them? Do they catch it and then lob it away from the wall so it doesn't hit anyone below? Do they aim for the British? Do they just check below to make sure the coast is clear? What is proper toilet etiquette on a big wall?