We hear many stories about people claiming to have left there body while being fully conscious or experiencing an out-of-body experience (OBE). While many times the argument comes down to "your word against mine" there is a lot of scientific evidence against these so called out-of-body experience. In one particular case a Dr. Garth C. claims to have left his body while lying down in bed one night. He insists that just as he laid his head down on his pillow he left his body in an upright position and traveled into space. Once in space he claims have a seen many events like great migrations, wars, and land movements. Upon first hearing this story you might think this guy is joking around, as I did, but as you read further you see that this guy really believes he was consciously awake through this experience. It is obvious that Dr. Garth is breaking many of the principles of science. First and foremost he is ruling out any rival hypotheses. How does you know that he had not fallen asleep and this was all a dream? This would be a much more believable explanation for what he experience/saw. And even if he believes he wasn't asleep, there is no scientific research proving that consciousness exists outside of the body. Dr. Garth is displaying strong belief perseverance when still believing his hypothesis is right, even with scientific evidence proving him wrong.
Someone leaving his or her body is a pretty extraordinary claim and one needs to be able to back it up with extraordinary evidence. The only evidence that Dr. Garth has is his word. There is no way prove that this actually happened to him, so this brings us to yet another scientific principle being broken; falsifiability. Because there is no way to test his hypothesis for incorrectness it is not a valid hypothesis or claim.