This was in the ER. Fire department picked up a 90 year old lady for an extreme Tylenol overdose. They gave liquid charcoal in route for the overdose, which makes you vomit black colored vomit. 

Imagine a decrepit 90 year old lady with thick black vomit stains on her face and shirt screaming "just let me die!" "I want to die!" At the top of her lungs. Spitting black spit and vomit around the room. These were probably her last words, she got intubated shortly after arriving and sent to the ICU. 

I've seen a lot of shit in ER and Trauma room but that one has stuck with me. Some horror movie stuff.