I'm absolutely horrified at what those kids did to you. Although science and medicine aren't my areas of knowledge -- isn't something like that dangerous? At the very least, unsanitary? I also wonder how premeditated their actions were, since you obviously didn't witness one of the kids peeing into the bottle -- did one of them urinate into it, hours beforehand, just so they could "lay in wait" for a target to terrorize? Demented!