I had a really weird power-trip interview once, and it was the CEO who was joined by a contractor who was ostensibly the technical lead for the project. There was nobody in engineering who worked full-time on the job, everybody was contracted. I was also going in as a contractor so I was aware that the interview would be a bit lighter on process as a result.

The questioning very quickly veered away from technical stuff and into stuff like, "where do you stand spiritually?" and other questions probing into whatever bizarre cosmic insights I could pull out of my ass at the time. He was the really intense kind of boss who wants to make sure you know of it with the hard back/shoulder slaps and micromanagement, and I could see his office from the boardroom which basically had an array of monitors all wired up to CCTV so he could watch (and hear) people from the comfort of his desk.

If any of that wasn't a red flag, getting hired literally 5 minutes after leaving the office was probably the biggest. I lasted about 6 months and even trying to leave was an ordeal.