Needles, I hate needles. I can't look when they give me shots. For whatever reason my blood pressure changes drastically when I see a needle about to be shoved into my arm. Because of the blood pressure change I get light headed and have had problems standing up after getting shots before. That's why I just look away when I need shots.
The smell that makes me sick currently is the smell of raw, unburned diesel. Gas is OK, infact I love the smell of Gasoline, especially at a race.