I've quit a bunch of jobs and never been fired, and always gave proper two weeks notice. Never walked on a job, not even the shitty ones I probably could have. I always left on good terms, albeit possible "sticking it to them" on a few ocassions and leaving them in a bind for a bit.

However, there was one job I had up here, for a small field tech IT job. Essentially small business IT, going out to the businesses, fixing stuff, going back to the main office, etc. Was a job to fill the gap between better jobs as I had recently quit another place. But it was the biggest joke of a job I've ever had in my life. The owner was a real intense toolbag, and was dishonest from the start. He told me in the interview it was a FT full employee position, and that he would reimburse me for gas and mileage on my car (I asked specifically for details about these things), since it was field appointments I'd be doing. Well, on my first day he hands me a 1099 tax form (for contractors), and informs me I'm a contractor for the first time. Strike one. When I fill out the paperwork I realize there was nothing about mileage reimbursement anywhere, so I ask, and he says "Well your a contractor, so you can just write it off... it's even BETTER than reimbursement". Stike two. I mention that I felt he had lied to me during the interview process about what type of employee I would be, and that he flat out lied to my face about mileage reimbursement. He says "Well I'm sorry you were confused". Strike three.

"You're right, I am sorry I was confused, and more sorry I gave you even a minute of my time." and I got up to walk out, he tried to stop me and grabbed my arm and asked why I was being so unprofessional, "I don't care what your side of the story is but you flat out lied multiple times during the interview, and now you're physically holding me as well, gee, wonder why I don't want to work here?". He just let me go and I may have told him to go fuck himself. He tried calling me the following morning to see if I was coming in and I told him no, then he tried to guilt me into coming back saying I was screwing him over and he had a lot riding on me. When I declined, he informed me he was "a powerful person in the local IT market", and that I'd have trouble finding a job if I crossed him.

Only job I've ever walked from, but technically I didn't even finish the paperwork so I still maintain I have a clean record of never walking off a job. That guy was a complete psychopath.