Story time: I was a young programmer in the 80's, working in an environment where the computers were all housed in their own special isolated computer room, and we devs had to use terminals to gain access - a typical computer ops setup, you've seen it all before.

One day, in order to comply with some law or other, the company upgraded the security system, renovating the space such that it was enclosed in bullet-proof glass panels, required a key-card to enter, had an operator at all times (24/7), etc. They installed a Halon fire suppression system, and a gigantic alarm horn to function as a company-wide alert.

Well, the day it was all set up, it was time to test it all - Halon test dump, done (very expensive test). Operator still alive (had to use an oxygen mask), done. Alarm siren test: done. Okay, back to work .. hang on .. all of the systems are down .. what's going on ..

Yes, the siren was so loud, and had been positioned close enough to the bullet-proof walls, that the focused energy it created had crashed the disks. ;)

That was a very expensive renovation. Fortunately, we got the 'restore from last backup' test done pretty quickly ..