A2K challenge!

Well I've looked, but I still don't understand. I give up, but thank you for the challenge. I had fun trying to figure it out.

IMO, the problem with this is that there are too many possibilities.

1) Perhaps one man is significantly shorter than the other, and so the two men had different exposures to some chemical.
2) Perhaps one man has asthma or emphysema.
3) Perhaps the fainting spell had nothing to do with the odors at all, and the man recovered normally after lying down for some time.

With no way to obtain additional information, it's a rather silly pursuit.

Ok here's a hint, what do you see, and do you think my answer to this topic would be? http://able2know.org/topic/162864-1

Ups forgot to add

Yeah I figured that.

Oh for heaven's sake, one was allergic to the scents. I am, it's aweful

He's allergic to smelling salts is my guess...

Yes indeed he is allergic to the smelling salt, but that's not really fitting the problem solving of the story.