Other odd, rare or unique cars you've seen at shows

I saw this one at a local car show a couple of weeks ago.

Attachment 52009 Attachment 52010 Attachment 52011

It's called a Bitter CD and I'll admit to not knowing anything about it until getting home to read up on it a little.

https://en.wikipedia.org/wiki/Bitter_Cars

Any of you guys come across one of these before?

Any other cars you've seen that you'd put in the odd, rare or unique category?