It’s sufficiently foul and is heavy in the air, as in you can smell it for an hour or more after he’s left. The foulness reminds me of the GI wing we had, were the hospital put all these cases in a single cluster so as to try and contain the smell. A “GI bleed” has a uniquely poopy smell, that is what I remember quite specifically. Hard to explain other than it is more than a smell, I have a strong stomach and never got sick myself, but it almost makes even me want to vomit.

FWIW, other smells that I recall quite well - child birth, or, more specifically the odor of women in labor (there’s a specific smell some women in labor produce, not all maybe half, that found it quite gross), gangrene and necrotic/rotting flesh, formalin, the morgue (it’s a weird mix of chemicals and rot), all come to mind.