> his bloodstream and his nervous system, but I find it very hard to believe that what he heard was actually either of those things Sometimes if it's really qu

> his bloodstream and his nervous system, but I find it very hard to believe that what he heard was actually either of those things Sometimes if it's really quiet I can hear something that seems to pulse at about the right speed that it could be blood flowing, so I don't find that very hard to believe? Or am I hearing something else?