In article , Greg Dermer says...

Silane. Yeah, I noticed that. The mind reels. If he really means what he
says, I hope he's a looong ways away from Portland Oregon.

-- Greg

For the rest: Silane is SiH4 if I'm correct. It's
a gas frequently used in semiconductor manufacture,
and is both toxic and pyrophoric, which is to say it
ignites spontaneous in the presence of oxygen.

The 'soot' is, of course, sand.

Jim

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