I haven’t had an NDE, but I once had a vivid experience during deep meditation that felt completely real, until I later recognized it as a lucid dream or a hypnagogic state. The brain can create incredibly immersive experiences, especially under stress.
For context, the hypnagogic state is the transitional phase between wakefulness and sleep. It’s when you’re just starting to drift off, blending wakeful awareness with dream-like experiences. This state can produce vivid hallucinations, such as flashes of light or phantom sensations like floating or falling. Some people even experience creative insights in this phase, and it’s often used by lucid dreamers to enter dreams with awareness.
That’s how I see NDEs, more likely a neurochemical response than proof of anything beyond. The common themes, light tunnels, out-of-body sensations, align with what we know about the brain under extreme conditions.
It doesn’t make the experience any less profound, but I lean toward a physiological explanation.