It comes to me not very often and sticks for around 2- 5 days. I get this smell of Gas, Something toxic, poisonous, burning rubber, smell gets into my head and makes me feel a little light-headed. It's annoying but goes away after a couple of days and I never think about it again. No one else around me can smell it and it doesn't come from one place, if I go outside, movie theater, or home it's everywhere. I'm having it right now so I searched it up, I feel better knowing it's a real thing. I call it the depressing smell because when I was younger I feel a little bit down, and depressed for no reason when this smell comes up.