The six stages of debugging

Our Product Owner & Co-Founder Toni posted on his Facebook page the 6 stages of debugging, probably thinking about our current Beta experience: 

1. That can’t happen.
2. That doesn’t happen on my machine.
3. That shouldn’t happen.
4. Why does that happen?
5. Oh, I see.
6. How did that ever work?

This morning we run through all stages.