Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: &nbsp;  
(like all tifus, t="that time when" not "today.")  back in the late 80s, i was a repair tech for a computer manufacturer.  a lot of maintenance had to be done in the wee hours because i worked on production systems that ran entire businesses.  i had to upgrade a system, but wasn't allowed to take it offline until 3am.  i got to the data center around midnight, though.  so i was pretty bored.  at the time, computers were huge, and most were encased in large fridge-sized (or bigger) enclosures.  "skins," we called them.  today everything is in standard 19" rack enclosures.  
so to amuse myself and pass the time, i went around the data center and peered into other systems.  many of them had a sort of lever-style handle that opened them up, so when i came to a really large handle on a system that was set up against the wall, i didn't really pay attention to anything else.  
i pulled the lever, thinking it would open and i'd see whatever was inside.  nope.  it turned off all the things.  the data center went dark.  the emergency lighting came on.  and i heard the sound of hundreds of fans, disk drives, high-speed printers, tape drives, etc. whirring down all at once.  it was like that scene in star wars where obi wan kenobi powers down the death star's tractor beams.  
peering up in the dim emergency lighting, i read the words "ups power cut off" (or something like).  a ups is an uninterruptible power supply.  it keeps power going to a system or a place in the event of a blackout.  in a data center, they sometimes use really big ones, with the temporary power provided by of lead/acid batteries.  lots and lots of 'em.  i realized had just cut power to the entire data center.  
i can only describe the sensation i felt by saying that it was like someone had replaced all the blood in my body with liquid nitrogen.  i couldn't breathe.  my vision narrowed until i could only see a small spot in front of me.  i was screwed.  
i tried pulling the handle/lever back to its original position, but only a few systems started coming up.  in my panic, i thought maybe another power cycle would help.  so i threw the switch off again, then back on.  even fewer systems booted up.  so i did it again.  and again.  and then finally the ups wouldn't provide power anymore, and i smelled burning insulation somewhere in one of the battery enclosures.  double screwed.  
being a basically good person and wanting to take responsibility, i immediately phoned my customer contact and confessed what i had done.  except not really.  
instead, i got out a flashlight from my tool kit and went all over the data center wiping my fingerprints from every handle.  and then i called my customer contact and said "the data center just went dark.  i smell burnt insulation.  you probably need to get an electrician in here."  he paged a guy, who came out, looked into the ups, found a fried wire, and said "here's the culprit!"  he fixed the problem, powered back up the data center, and then the rest of the evening other repair techs and administrators for all the other systems came in to boot up and get things running.  i quietly did my hardware upgrade and left.  
the next morning, my boss asked me to step into his office.  he said that the customer had called him because he wanted to formally thank our company for reporting the power problem, and that if i hadn't shown up for my work early they would have never gotten back online for the next business day.  he handed me a $50 gift certificate to a swanky restaurant and told me to take my wife out for dinner.  i have tifu'd many other times in my career, but that was the biggest one that i got away with and the only time i failed to fess up.  what can i say?  i was young, scared, and it was my first "real" job.  lesson learned.

TIFU - by powering down an entire data center