This can be anything from getting fired for something stupid to pooping your pants on the job. My first job when I was 17 was at an auto shop that I got because my cousin stuck his neck out for me and told the guy I was a good worker. It was a legit shop as well, not a Jiffy Lube or anything like that. The guy started me out with changing oil since it was one of the few things I already knew how to do. I had 3 oil changes to do that day and none of them had customers waiting so I could take my time. I was still super nervous though. I was a shy kid so the thought of having a job really made me nervous. I just didn't want to screw up. First oil change went smooth. I was like ok...I'm officially becoming a man now. Second oil change I forgot to put the oil filter back on before I filled it up with oil. I didn't notice it until I was filling the oil up and it puddled under my feet and I almost slipped on it. I freaked out and started trying to clean it all up without anyone noticing and I ended up covered in oil. I had to clean the tires and everything on the car so it didn't splash up when they were driving away. At this point I was feeling really really down on myself. Third oil change I set the oil cap on the toolbox and it fell back behind it. This was one of those large 5ft tall stand up toolboxes. I put my hand on top of it for leverage and I bent by body down the side of it so I could reach back and feel for the cap behind it. I didn't know that the toolbox was super top heavy and as soon as I bent down, the box tipped over and crashed right onto the front of the car with it's hood open. It tore the bumper all up and tools and all kinds of junk crashed into the engine department. At that point I wanted to just kill myself. I told the boss I guess I wasn't ready for this. He was cool about it even though I could tell he was pissed. He paid me $50 and told me "good luck with everything" lol. It was one of those "Am I even going to be able to make it in life?" moments. I didn't stop feeling like shit until I got my next job and proved to myself that I could be a functioning human being.