Production 404 - Taking down Production by Accident

Once I was doing what I do best and exploring a product and I decided to see what happens when I have a lot of concurrent users running on the system. So I started performing this test in a staging (pre-production) environment. Then as I was doing this test I started to notice the screen in the room that displayed the status of the servers in production all going red one by one signalling that they were going off line disrupting customer service. Everyone panicked saying the production system was down and they were not sure why. I started to feel in my gut that my activities might have caused that and went slightly red in the face. The engineering director looked at me and said "what are you doing right now?". I was open and explained what I was doing. They said "You do know the staging and production databases are linked right?". I honestly had no idea!! I felt so embarrassed! Luckily the system recovered very quickly, but a lesson learnt to always understand the architecture before you go testing.

Do you have any similar stories to tell? Let me know in the comments