It’s the late 90s and I was working in IT for a small (200 employees) company.
One of my tasks was performing daily data backups, which ran for about four hours and started after everyone else had left for the day.
We had an intercom system in the building, where if you picked up your phone and dialed a specific extension, you could page someone, or make announcements so everyone could hear.
One night I was in the process of running Ethernet cable from switches on the second floor down to individual terminals on the first floor, so there was a lot walking around the building.
I like to have music when I’m working, but I didn’t have an MP3 player at the time, so I thought… “I have music on my PC and no one is around. Why don’t I just…”, and I went around and cranked the volume knob on every ceiling intercom speaker in the whole building. Then I dialed into the intercom from the phone in my office, put the handset up as close as I could to my PC speakers, and boom, music throughout the building.
Cut to a few hours later, it’s late, I’m tired, the backup is finished, so I close down the system, hit the lights, lock the doors, and go home.
The next day, I come in, not thinking about anything from the night before, and get to work. About 11:00am, the owner’s secretary got on the intercom to page someone… and blew everyone out of their seats. There was an almost collective, “What the fuck!!!” from everyone, and an “Ohhh, shiiit” from me, because of course I immediately knew what happened.
I ran around like a madman, turning the volume down on all of the speakers that I had forgotten the night before, while saying, “No idea… Yeah it’s crazy… No no, it’s fixed now…”
No one ever found out exactly why the volume was so loud that morning.


The big annual release was coming soon and I was leading a small group of testers with after hours testing of a feature that was my responsibility to cover. It was already around 8pm and we’d been working for hours. Someone came and informed us that a specific device was incorrectly configured, thus invalidating all of the tests we’d run thus far. It was mine. What an asshole.
I told everyone to give me their devices and go home. I stayed until 2-3am running all of the tests myself. My manager video called me a couple of times and he had a good sense of humor about it, I think because I took responsibility for it and didn’t burden others with my mistake. I really felt terrible but after I got the report in before the deadline later that morning, no one ever gave me a hard time about it and it just was like it never happened.
Not trying to deflect or make excuses and owning a mistake is like a super power. An imprortant lesson that has basically never failed me when I’ve screwed up at work.
Seconded on owning a mistake. It might get you reprimanded, but it usually doesn’t get you fired.
If it gets you fired the company culture turns toxic very quickly. I’ve worked for a place like that once and quit when I saw that bs.