Have you ever quit a job and walked out without giving any notice? What caused you to leave so urgently?
Well I did one time, because the boss who was also a close friend (which can be complicated) got many months behind on paying me. This was “constructive dismissal” in the jurisdiction concerned so I could leave the moment I liked. I didn’t want any discussion so I just came in at a weekend, fished the fish out of my office fishtank and took them home, and took all my other personal belongings home. I took the computer and car from the company that I had been using as lien against the debt, and later we agreed on a payment plan which involved me taking ownership of those assets as part of paying off the debt to me and me forgiving part, and an instalment plan with interest for a third part, but already I had to work elsewhere. Obviously I had got the new role sorted prior to walking out the door.
I did not steal his clients or run on his business although some who wanted to come to me did come over and I declared these in every case.
Ten years down the line I am trying again with the same boss, as he seems to have learned his lesson and we both missed the good times we had working together. But he knows how I will react if he ever does that again, and so he will make every effort not to.