Does anyone have a list of 'hidden' vehicle configs?

I was playing a challenge today...a king of the hill type demolition derby challenge using the supplied vehicle that I had never seen before. I failed very quickly and got thrown off the building but glitched into a never ending ocean of water. I Quick Travel'd to somewhere and I was still in the vehicle. This vehicle is not available in any of the selectable configs so it got me thinking: How many more 'hidden' configs are there in BeamNG.drive?