How else would you account for your mass hallucinations if it's not chemical in nature. [Then he swiftly held up a hand to discourage a reply] You know what- nevermind. I don't think I want to know.

[Kaiba was a skeptic on anything he couldn't explain, so if this had anything to do with something outside of scientific theory he was over it]

Like- that. [Pointing to the sky] .. though that's normal to you, I realize but it's not in reality. [Not his reality, reality in general] Haven't you observed any other oddities yourself? [Not really wanting to turn this into storytime] Sudden weather shifts and physiological changes- the terrain also expands and contracts over time but not at a rate that would make any sense...