Smiling as I'm grateful of people such as Andrew who are observant of their surroundings and act on hunches.
During the 2020 lockdown I was out cycling with my teenage son and I had a heart attack during that ride. Passer-by in a car saw me hunched over on side of road and thought things didn't quite look right so he turned around. My son was already on phone to ambulance at that stage but our good samaritan stayed to support me and my son and hung around until my wife and medical services arrived.
EDIT: Adding that he was also prepared to break his bubble to render whatever assistance if it came to it.