The Fail Was Strong
This reminded me of my last job. I had made rather strong recommendations that we get some true power redundancy on our core switch stack, since if any single component had a power failure, our entire network (13 branches) would go down. I received enough resistance that I stopped talking about it.
About 2 weeks later, it was time for our routine generator test. Of course, the switchover to generator power caused a blip in the mains supply, and the single UPS holding everything together promptly passed out. I felt a great disturbance in the Force as dozens of employees screamed in terror and went offline.
I spent the next 15 minutes in a state of calm, and recommended the power redundancy again afterward. It was swiftly implemented.