From USPS News Link:
Tulsa, OK, Letter Carrier Merlie Bell was delivering mail when he noticed a woman in a parked car in distress. He instructed a bystander to call 911 and entered the car to check on her condition. With the 911 operator, it was determined the woman was having a seizure and Bell followed instructions to keep her comfortable. After emergency responders arrived, Bell continued on his route. A bystander later sent a note to the Post Office, thanking Bell for his actions.