Not sure about insane, but I had an odd one this morning.
I went back to a job I used to do over 10 years ago. The old manager was still there, however I couldn't find my old desk, which I thought they should have kept for me as it had all my stuff in. Instead it had been thrown out when they replaced all the desks with new ones, however they were tiny - almost child sized. Everyone was trying to convince me that this was fine, however I got angry and told them I couldn't work like this, stormed out and went back to my current job. And there was my old desk waiting for me, filled with my old stuff. And then I woke up.
It's the sort of dream that makes you wonder if it has some meaning, however it was plenty weird as the old manager retired a long time ago and I have never taken a desk with me when changing jobs. I certainly wouldn't want to go back to what I was doing all that time ago, plus I have no idea what the stuff in the desk was that seemed to important to me, or why (if it was important) I would have left it behind in the first place.