Ghostbusters Were in Lansing Sunday!

I was waiting at the light on SB Cedar Street at Oakland yesterday evening just after 5:00 when I saw an 'official looking' vehicle pull up next to me, which always makes me panic. Which is stupid.

I pretended like I didn't see it right away, then saw the Ghostbusters logo just as it pulled away, which resulted in these rather blurry photos.

What's the story - is this simply a novelty car or are they really hunting ghosts?