I've been to many Black Metal gigs where you might experience quite strong smells of fire, smoke, incense, blood and death. But this band I saw last night seriously take the throne of foul smells to a whole new level. So bad it made me gag a couple of times. And they smelled like strong diarrhea. (I even had to take a shower afterwards cause their stench was so strong). They were super great though. But if I'll watch them live again I better bring a gas mask.
The band was Ultra Silvam.