like, i'm not just saying "this is gross, gag, vomit.". what i'm saying is "my body is having a negative physical reaction to the amount of secondhand smoke in the unit, and i am about to have a fit of violent vomiting, whether i like it or not."

and, of course, if your body wants to vomit in a situation like this, you should let it - because, by doing so, you're ejecting a stew of toxic chemicals, in the only way your body understands how.