I saw that. He was saying "Just kill me" and "I want to go home". He was already bloody, so it was when he ran back on the plane. I am firmly in the camp that believes United was way, way out of line physically removing a paid passenger after boarding, but there was something wrong with this guy way beyond being emotionally distraught from being dragged off the plane. Maybe drugs or psychiatric illness, if this guy was my doctor, I would find a new one immediately.
Dr. Dao was unconscious when UA dragged him into the jet way and left him there while they looked for wheelchair.
Dr. Dao regained consciousness and for good reason was a bit out of it.