It's good to help someone who is choking on food.
Robert sees a stranger choking on food at a restaurant and is considering using the heimlich maneuver on him.
Robert wants to decide if he wants to help the stranger out or not.
Robert quickly moves to the stranger and uses the heimlich maneuver to save the stranger.
Robert sits back and waits for someone else to use the heimlich maneuver on the stranger.
The food gets dislodged from the stranger's throat and his life is saved.
No one steps up to use the heimlich maneuver on the stranger, so he dies from the lack of oxygen.