My wife had a procedure under general - one where they had her legs pulled away back after she was out. She woke up during it to the point where she could hear them talking, but she couldn't say anything. She told the doctor at the follow-up that she heard them talking and he said lots of people think that, but it's just hallucinations from the drugs. She said, "One of the things you talked about was your kid's soccer game," and he got an "Oh shit" expression and moved the conversation to something else.
Why did he do that, you might ask? Because another thing they did was make fun of my wife in the position she was in. Extremely unprofessional, and she could have made a stink about it, but she just indirectly let him know she heard it.
Reminds me of something from the opposite end of the lifespan. When I was young, they didn't clear the theater after a movie, and they sometimes had "double features" where they'd alternate between two movies and you could watch both for one ticket price. My dad's aunt lived with us (she was probably in her 70s at this point), and one day a couple of her friends picked her up to go watch "a double features of animal movies" at the local theater. They dropped her off some hours later and her face was grey - she said it was horrible, and didn't want to talk about it.
It turned out the double features was Day of the Animals and Night of the Grizzly, basically both horror movies. They didn't think they were allowed to leave during the movie, so they stayed through both.