Exemployees of a company, what was your "fuck this shit I'm out moment"?

My original contract was anytime before 9 to whatever 9 hours after star was. So, if I decided to get to work at 9, my shift would end at 6. If I didn't take a lunch, it would 5. Now, I usually left anywhere between 7p and 9p (averaging on 7p), with some days at 11p. So, given the extra hours, I allowed myself to get it as close to 9 as possible, considering I'd likely stay 10+ hours anyway. Turds tended to hit the fans around 4p/5p, extending my hours. It was the nature of the job.

New manager comes. He doesn't like that his employees don't get there at 8, but doesn't bother to tell me. He just tries to writes me up. We have policies, where I have to be told and given an opportunity to improve before a write up, so he and HR do that. But what they say is, "if you don't think you'll get to work by 815am, call Mr. Manager". Ok, cool. So, I call him every morning. Then the write up. I ask why, and they said that I'm not at work by 815. I explain that I'm adhering to my contract AND I work WAY longer than anyone else, including Mr. Manager. "That contract was with the previous manager" they said. "With all due respect, it wasn't. It was with the Company. And Mr. Manager never attempted to renegotiate a new contract, nor would I have agreed to it anyway. So, let me get this straight... You care more about arrival time, than the hours I put in ensuring the lines never go down?". "Yes" they respond, "but you still have to make sure the lines don't go down". "Ok, so the extra hours and effort I put in, every single day, mean nothing and I'm still getting written up?" "Correct". "Ok. The consider this my two-week's notice"

Whoo. I thought I was over this, but reliving it just now pissed me off something fierce, I'll tell you that for free!