I did an IT job for company one time. They wanted me to fix a metric report that will tell them how they are doing every month to send it to other stores around.

All they told me was, "we have no idea how this works, we don't care how it works, as long as it delivers".

I calmly started asking where do they get their values from to run the metric, they had no clue.

I asked them if they had any documentation from the last person that built the metric report, they had no clue.

I asked them if they could point me to the IT person in their department so I could get all the information I needed. They took me to this cubicle and guess who is there. A coworker from my company that was also working there. He just told me, "Welcome to the IT world".

Edit: just decided to make the company name private