What's the worst scent you've ever smelled?

[rado84]

My sister just cooked something that smells like in my worst nightmares, so I decided to ask you: What's the worst scent you've ever smelled?
For me it's the smell I'm gonna try and describe. I suppose you all know what a wet stray dog smells like? And I'm talking about a stray dog that has been in the streets its whole life. Well, think of 100 wet stray dogs stuck in a 4x4 meters room with you right in the middle of that. The smell is so bad that even the two flies that came god knows from where ran away...
In case you wonder what is it that she cooked - it was wieners - supposedly made in Germany.