To be fair, I do the same thing, always talking to a patient as though they can hear me. Your sense of hearing is the last sense to go before death. It is just something we were taught a long time ago and I have seen young nurses do it, so I assume it is still being taught. You always want to explain what you are doing just in case.
Someone brought up an interesting point upthread about the female EMT possibly having been told what was up prior to her reaching EG. I thought about this and I think you may be correct. Typically, we are briefed before treating a patient and assumptions are made. In the ER, I worked closely with LE, Paramedics and EMTs. And yes, they set the tone sometimes when a belligerent, PITA patient was brought in. It didn't change the level of care, but it did "prejudice" us in a way and affected our attitude to an extent.
I have had to be nice and considerate to patients that had shot a cop, shot at cops, killed a spouse, killed a child, a serial killer, thieves, common criminals and give them the samenlevel of excellent care. Those were the most difficult patients to personally care for, because they had no regard for anyone but themselves. They hurt people.
I did my job and I did it well because it was the right thing to do and it was expected, a given. I remember once when this unresponsive, barely breathing guy was dumped by his "friends" at the entrance of the ER. Simply pushed him out of the car and onto the ground and drove off. I was at triage and saw this happen. So I grabbed some co workers and Security, and got him into a wheelchair and then onto a stretcher. He had overdosed on heroin and would have died if we hadn't given him Narcan. He woke up, cussed us out, spit on us. We had to call LE for assistance and they came and helped us, handcuffed the guy to the stretcher, so he couldn't injure us as he was swinging.
Sorry, I digressed. You got me a rememberin.