While travelling along the interstate between who-knows-where and woebegone—a long way from any EMS services—you come across a rollover accident that has just occurred. For some reason you’re not carrying any medical equipment. (Why not?) One of the van’s former occupants is in respiratory distress from a chest injury and needs a chest tube. When you ask, a trucker who has also stopped says that he has some tubing in his truck. So, now you need a scalpel.