I've walked out twice. I won't say what line of work because colleagues use this sub.

The first one was because the interviewer shouted at me. He explained my day to day as colleagues will send me tickets and I'll do what they want, to the letter, within a set timeframe. No communication. I asked politely if there was any room for collaboration or giving input and he slammed his fists on the desk. "THAT'S NOT HOW WE WORK HERE!" I laughed (I couldn't help it, it was so unexpected) and told him I don't think this role is for me. He sent me a rejection email a week later.

The second one was because of a skills test. A guy put me in a room and said I had 90 minutes to complete the test. There was a stack of papers with 5 tasks and supporting materials. Not only was it over the top but I estimated it would've taken almost twice as long. I went to reception and asked to talk to him. When he showed up 15 minutes later, I explained my problems with the test and he said "We've calculated how long the test should take the right candidate to complete." I said I know how long these things take and I don't like what this tells me about what they expect from their employees, and then I left.