You respond to a call of a person down. When you arrive, you…

You respond to a call of a person down. When you arrive, you find a 35-year-old male patient on the ground in front of his residence. A woman who identifies herself as his wife tells you that he went for his morning walk this morning. When gathering a SAMPLE history, she tells you he is a diabetic and did not eat breakfast but gave himself an insulin injection. What do you expect is the most likely problem: