Here's a car. It has four wheels (five if you count the steering wheel).
DRIVE IT INTO A WALL
RoR 0.38.33 version
I update this, and all of my cars periodically because I'm always finding new problems to fix, so check this thread every few weeks or so. Last update was 12/13/2010 1PM GMT.
Current versions are:
YOU MUST HAVE THE NEWEST BETA OF ROR (37.XXX) TO USE THIS