Worst dream I ever had was that I owned a white Jetta with orange wheels. I woke up visibly shaken, and now it's a running joke with my wifey who points them out whenever she sees them. What made the dream so harrowing was that in the dream I thought the car was awesome.
Next worst dream was that I owned a red Ford Probe which I thought was awesome as well.
Ugh. I think most of my nightmares are like this, where I own some terrible car that I despise in life, but in the dream I'm a ricer and I think the car is badass.