"Assuming you are a guy, why wouldn't you have kicked his ass?"
Uh, because I would have probably gotten my ass kicked, tough guy. Besides that, if the guy really had something hazardous, then I don't see how it would have been prudent to go rolling around on the floor with him thus exposing myself to even greater concentrations. Actually, I am more afraid of my wife than this guy - she would have killed me if I did something as stupid as you suggest.
...Of all pieces of advice that people have lavished on me--oh, discreetly, courteously, almost without seemingly to do so--I have retained only one, and it's advice that I never follow: "Be prudent!" It would seem that because of present circumstances, as they say, I should be prudent. According to my way of thinking, however, the best way to learn to be prudent is to realize just how imprudent one can be... Prudence is the virtue of happy days, of prosperous periods. When you find yourself well sheltered, why the devil go outdoors to look for trouble? But when trouble is looking for you, it's primarily a question of facing it, since it would be still more dangerous to turn your back on it. In that case, prudence is only the alibi of the cowardly.