"A buddy of mine said he was on a flight after 9/11, and a woman started having a stroke. A doctor from the back of the plane ran up the aisle to help her, and an Air Marshall didn't know what was going on, and he punched the guy in the face and knocked him out. Thought he was a terrorist."
"What happened to the woman?"
"She was okay, I guess. My friend told me that when the doctor came to, the Air Marshall was sorry and apologized. Told everyone to forget the incident."