I walked out of a job last year at a central government department. I was working for a pretty useless manager who was nice but useless, that useless he was promoted. Unfortunately he was replaced with an utterly revolting and racist Australian bloke.
I took an instant dislike to him and so did my twelve Kiwi temps. He used to bully them relentlessly and after a bit started on me. He used to make racist comments to one of the black temps and generally abuse the rest.
I waited until he had a couple of days off and moved myself into an empty office. The day he came back he asked one of my temps where I was and he was informed that I was in my office.
His face went red with rage and he stormed into 'my office' where I told him that I was a little too busy to see him and could he make an appointment with one of my temps 'and do it politely'. He went crimson, fired me on the spot and marched me out of the building.
I shook his hand and wished him good luck with a huge grin on my face. His grin rapidly disappeared when he realized that he did not have the authority to sack me but in his fit of rage, never thought through the consequences. ie I had another four months left on my contract and he would have to pay me for it. His face went from crimson to ashen.
To add to his misery, eight of my temps walked out in sympathy and he was left to run a busy project office without the benefit of my knowledge and without most of his staff. Apparently he got carpeted by the department director.
I was paid the four months money and went travelling for four months, hooking up in Spain with one of my temps for a week or so. I used to periodicaly send him post cards informing him what a great time I was having. The remaining staff used to know when he got one as he went red with rage and would not speak to anyone all day.
After I returned I was informed that my email account was still being used by some new temps he had got in

so to pile on his misery, I wrote a letter to the department director and cc'd it to the Departmental minister threatening to report the department to the Information Commissioners Department.
Racist Australian soon lost his job after that and headed back to Perth with his tail between his legs.
Job done.
The lesson he took back to Oz with him was 'don't fuck with Fingers as he is sharper than you and he does not have much time for racist twats.'
