<< Cigarette smoke. Makes me wheeze, cough, sneeze, and gives me sinus headaches. It also makes my throat hurt and I get itchy under the skin of my throat if that makes sense.>> - Azraele
Same here. Nothing makes me feel as miserable as cigarette/cigar smoke. I always try to get away immediately if someone starts burning one of those cancer-sticks.
I also get blurred sight because contactlenses don't mix with cigarette smoke. Very unconvenient.