Hi danny5
Yes, he was most fortunate. The way that his behavior was discovered was while driving with my daughter in his car, he drove through a stop sign!
Wisely, she immediately checked the gage on the oxygen tank, and discovered it was not turned on. "Grampa looked real guilty."... so the game was up. With help from the physician and vigilance of the passengers, this was not repeated! We are grateful!
Thank you for your kind words.