Diabetes can be very difficult to manage. Even using Metformin or Glucaphage can fail if there is a lot of stress (of any kind). I had to triple my dosage when I started cross-country commuting again (after having it totally under control when I had a local gig).
Yes, please be cool Freepers. I think she did the right thing by telling the audience she couldn't continue.
If you've not walked a mile in her shoes, don't knock her socks.