A bit late to this one, but at work:
I was wrapping up on a 3pm-12am shift. Boss calls the store and practically *begs* me to do overtime and show up at 6am tomorrow because the 6-3 person called out and I'm the only one who didn't say no. Well, I needed the money and figured it'd look good vying for a promotion, but also said I'd be tired and not to expect greatness but I can hold down the fort until 10am, then I had to be out. He agreed and thanked me.
Next morning rolls around, and I thought we had an agreement that I wasn't exactly in the best condition but he totally forgot I guess. Because he was halfway up my a*s about lagging behind in everything and wasn't moving as fast as I usually do because I was running on 3 hours of sleep at most.
Told him that I thought we had an agreement that I was not going to be up to my usual standards because of how little downtime I had. He was like "I still expect you do be able to maintain the bare minimum workload". This guy has unrealistically high standards, but I'd have expected maybe he'd not be a piece of s**t for once since I did this as a favor.
After that shift was over I made it very well known that I was not to be called for that kinda s**t ever again and from that day forward just did the bare minimum to not get fired. That event taught me that in most jobs management does not give a singular f**k about you.