Scent you CANNOT stand

Are there any scents that you absolutely cannot stand? To the point of if you smell them in the vicinity, you need to walk away or cover your nose? I'll go first: Ballet Nights. Ive only smelled it out in public once and I had to walk until I couldn't smell it. My sister had this spray when released, let me smell it and I had to come home and shower because even though I didn't spray it directly on me, it CLUNG and BURNED my nose. I'm not sure why that scent is so offensive to me, but it makes me shudder. Anyone else have a scent that truly cannot stand?

Update: I love reading all the replies!! It truly shows how versatile our preferences really are.