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: so this happened just a few hours ago. i work as a diesel mechanic, and we had about 30 minutes left before it was time to leave for the night. those 30 minutes are supposed to be spent cleaning up, sweeping and moping the truck bay. well instead, my boss wanted us to hurry up and do an alignment on the truck before we left. so we got all the sensors and what not, put onto the wheels and we were about to get started. now, my boss, asked if i could stay late and help him finish up said alignment and i told him i would help out just as long as i could leave a little early tomorrow. 
so continuing the alignment process, he had me switch the wheel chalk positions from the rear drive tires to the front drive tires. 
here is where the fk up happens... i removed the front wheel chalk and put it in the front of the front drive tire, and the rear chalk was barely underneath that rear drive tire so i yanked it out real quick and then the truck started moving backwards, and backwards really fast. so my first reaction was to try and stop the truck from rolling back any more by jumping back behind it to hold it. and for those of you that don't know, semis weigh any where from 20,000 to 30,000 pounds. i didn't know that the brakes were not set. (meaning the brakes weren't in park) so there i am trying to hold a 27,000 lb truck from rolling any farther. i am a large guy but there is no stopping a huge truck from rolling. during all this, all the alignment sensors and sensor holders are smashing and busting into hundreds of peices. i have everyone in the shop running over yelling at me to get out of the way and to let it roll. my boss had managed to run over and jump in the truck and set the brakes real quick before it crashed through the door. 
all in all, i broke all the sensors to the only alignment equipment we have and we use it every day. we have over 5,000 trucks in the fleet. the sensors and the holding racks cost nearly $10,000. that's not including the program to be updated when we get the new alignment equipment. may or may not lose my job tomorrow. i'm really hoping for the best... 

 

update: heading into work now, will let everyone know how it goes. either on my first break, lunch or if they tell me to leave. lol thanks to everyone for the encouragement and kind words. i hope it all goes well. can't be getting fired before the holidays lol 

update 2: came into work and everything was normal. kinda... everyone kept asking what happened last night and everyone kept looking at me weird but also thanking me because we get a new machine. so word was spread pretty quick to first shift. but that being said... i still have my job. machine is covered by insurance and will be getting new and much updated machine next week. we had a safety meeting on what we need to do from now on and we have changed how we are setting up the alignment process. so all in all, everything is all well. didn't get a slap on the wrist either just was told to get out of the way instead of jumping in front of a large semi to stop it. i guess i'm no superman after all. thank you all for the encouragement and helpful tips. ps. i know now it's chock not chalk. 😂😂😂😂😊😊

TIFU by breaking a $10,000 machine at work