 They're actually floating out of the brain scanner. They often say they're going into another dimension or they're going to heaven. So the frontal parts of the brain can create these very powerful hallucinations, whereas the visual parts of the brain really create rather simple ones. I'm assuming, David, that some people hallucinate without coming into contact with any kind of drug. Indeed. The most common hallucination that you might call internally generated, what we call auditory hallucinations in people,