[Peach]

Sulfur smells like eggs, doesn't it? I don't know that I'd describe that as a sour smell. But maybe in an emergency situation, witnesess don't choose the correct descriptive words.

[Peach]

Dummy explosions using detonators only (caption on FNC).

[Publius6961]

Sulfur smells like eggs, doesn't it? I don't know that I'd describe that as a sour smell. But maybe in an emergency situation, witnesess don't choose the correct descriptive words.

Pure sulphur does smell sour.
What you describe is sulphur dioxide. No telling what that animal had in the backpack. Perhaps he just skipped the "mix thoroughly" part...