I was a bike courier for years. One day I went into a building and someone was telling security that there was homeless guy passed out to the escalator. I went up the escalator and there were a bunch of business types standing around this guy (they were in the phone to 911). He was struggling to breathe and when I rolled him into recovery position he coughed up his tongue. So yeah, that was nice. I don’t know for sure, if he would have died.