I hope this program still exists- I've had a few of these in my wallet for years, but gave one out tonight. I was on a NYC-LAS flight that got diverted to DTW due to a sick passenger. There was an off-duty Delta flight attendant in the jump seat who gave the sick man oxygen, took care of him until we landed, and then explained and joked with the rest of the passengers while we were waiting in Detroit. The regular crew was great, too, but this guy wasn't even supposed to be working! I hope he gets some enjoyment out of the certificate.