How Do You Explain Near-Death Experiences?

If you don't believe in all that physical nonsense about the brain causing consciousness, then, and near-death experiences are almost universally cited as evidence for dualism, right? For the fact that consciousness is more than just brain activity. Well, but not if there's zero brain activity, right? Right. But then wouldn't that nullify the experience altogether? You couldn't have an experience if you had no brain activity. Okay. If you could show like the brain is flat-lined at a time when they are absolutely having an experience,. Then that would prove what? Well, that's a good question, right? It would just prove that near- death experiences are not brain experiences