Iron Out and CLR mixed - toxic gas? Someone I know mixed the liquid forms of Iron Out and CLR (Calcium, Lime, &amp; Rust Remover) together to clean out a plastic bathtub.

I have the SDS sheets for each: 

https://images-na.ssl-images-amazon.com/images/I/61Dkhh0JXRL.pdf - CLR
https://summitbrands.com/wp-content/uploads/2018/03/Iron-OUT-liquid-English-GHS-Rev-01-29-18.pdf - Iron Out

The bathroom smells terrible, has produced a cough in the person using it, and now my eye burns a little from very brief contact. I was wondering what kind of gas (if any) was created when these two chemical cleaners were mixed?
Most likely, sulfur dioxide. $\ce{SO2}$. was produced. The ingredients sodium hydrosulfite, $\ce{Na2S2O4}$, and sodium metabisulfite, $\ce{Na2S2O5}$, when mixed with acid, release $\ce{SO2}$, which oxidizes to $\ce{SO3}$ eventually.

$\ce{SO2}$ is quite irritating, but not immediately damaging in low doses, &lt;100 ppm, though it can certainly induce a life-threatening asthma attack. "Sulfur dioxide is mildly toxic and can be hazardous in high concentrations. Long-term exposure to low concentrations is also problematic." $\ce{SO3}$ is even more dangerous, since it forms sulfuric acid when it meets water, e.g. in tears in the eye.

Air the room *thoroughly. There is not much else to do: theoretically, ammonia could be used to form a salt, removing the gas from air, but there is no way you could balance the reaction, leaving you with an excess of one irritant or another.