People may think he's crazy, but part of psychedelics is hypersensitivity. I doubt he could actually see in the dark and smell landmines, but his brain probably recognized very small details and fabricated hallucinations based on what little he did pick up on.
I sort of believe the seeing-in-the-dark thing. I was at an LSD party with my friends one night and we took a black frisbee out onto an unlit field (no moon) and threw it around without once dropping it. We just knew where everybody else was and where the disc was at all times. I dunno, maybe we could smell the frisbee.
What a strangely ignorant way to reply to somebody trying to share your joy. Never smoked weed but you take acid? LSD isn't a "weird chemical" to you? Seriously? Reevaluate
No expertise here, but I wonder if neurons are more excitable on LSD. If every cell in your retina and optic nerve is trigger happy, you'd see more in the dark. More noise, too, I suppose.
Get out of Grateful Dead show on the last night in that town, hop in the car while still blazing face on 5 to 10 doses and drive hundreds of miles to the next venue. Night vision extreme!
Maybe the elevated brain energy along with the will to survive or to avoid imminent death might coerce other areas of the brain to align with survival.