At 08:36 AM 1/14/2010, Arkady Mirvis wrote:
>engulfed in a cloud of
>black-yellow smoke. I felt also a realy nose eating smell. What was
>that? I found that some "ingenious" drivers

I'd guess some sulfur compound.  Or if it smells truly terrible, like
death or feces, could be putrescine, methyl mercaptan, phenyl
isocyanide, butyric acid (rancid butter stench), cadaverine, skatole.

Yrs,
DAvid