Starship Asterisk*

I suppose methane was plausible to me, since, in my readings regarding Saturn's moon, Titan, I remember something being mentioned about the methane in Titan's atmosphere being found near to water vapor, and the refraction of sunlight through the combination glowed orange. To me, it made logical sens...

Perhaps I missed it, but did anyone totally confute the idea of the methane gas cloud emitted by the horses from the racetrack and stables below? It was my first thought since they DID mention the racetrack in the original description and this possibility WAS mentioned by at least one other contribu...