So, whats the coolest, oddest most expensive car etc you have sat in, driven, ridden

I used to install car audio and competed locally. One year our shop was able to get the Audiobahn 1955 wagon demo vehicle to one of our shows. We had a severe thunderstorm warning the night before. I had a pretty big garage so they let me drive it home and store it over night inside. :)
https://www.feslerbuilt.com/1955_Chevy_Wagon.html