That happened to my wife when she went quad 30 years ago. She was awake and alert and talking to the techs. They were saying we can't get a reading her brain won't allow us. A more experienced tech came in and asked her what was wrong why was she scared? She told the tech and he said were not looking for that {brain tumor she thought} and her brainwaves then showed up.
People who are in a Coma often hear, are aware of their surroundings but can not communicate, and their brain responds to what is going on around them, including hearing what others are saying.
Jeb Bush did nothing to save an innocent woman from being tortured to death. He lacked any compassion for her - and yet he cries for dangerous illegal aliens who mock our laws.
I would like to quote Martin Katz once again, "We, as a people, have so shamed ourselves, that we cannot look Mary Schindler, Terri Schiavo's mother, in the eye, and give her one good reason why WE did not allow her to give water to her dying child." (The American Thinker)