This happened at my most recent job a couple months ago. It was a thankless assistant position at my alma mater where they underpaid and overworked the entire team. They always scheduled us just a couple hours short of full time so we couldn't get benefits. They also kept switching my schedule between mornings and nights (happened like 3 times in the 2 months I worked there). I hated it but I wanted to have extra money to save.
Our team of 10 people was managed by 3 supervisors, one of which who took it upon themselves to be the ultimate power of authority (even though they weren't). She became verbally abusive, micromanaging, and made the work environment hell. She sent an email to everyone on the team (excluding the other 2 managers of course) saying all time off requests needed to be approved by her.
So one day I needed a day off for a required event in a class I was taking. I emailed her asking if I could either trade the shift on that day for another day I had off earlier in the week, or work my scheduled shift but just leave early enough so I could make my event. She emailed me back during the last 10 minutes of my shift saying “Absolutely not, we are very busy on that day so working another day wont help.”
By this point I was burnt out and done. Horrible pay, constant schedule changes, abusive work environment, and I couldn't get at least a few hours off? This was the last straw. So I didn't show up for my shift the next day. They didn't deserve a two weeks notice, I quit. I lied to my mom and said that I was still working because anytime I quit a job she overreacts and I didn't want to deal with that stress. I blocked the work calls and was going to relax for a day. This worked until I got a call from my mom, crying, saying that she got a call from my boss asking where I was and why I didn't show up for my shift. Apparently they called my emergency contact (my mom). So I was stuck on the phone for 10 minutes with my sobbing mother having to explain why I didn't go to work.
Needless to say, do not put your parents as an emergency contact.