I'm extremely sure it was a Ferarri, but it was dark and I couldn't get a good look at the thing.

It was red, and had the engine in the back, under tinted glass. And it was very sharp, almost looked like an F-117 on wheels. It was very short, both in height and length, and I really wanted to steal it. ANY idea what I'm describing?

Difficult to guess from that. No idea, sorry...

Try doing a few google image searches of different ferrari models. there's really not that many.
Here's some to get you started ;) :
Enzo: http://images.google.com/images?client=safari&rls=en-us&q=ferrari%20enzo&oe=UTF-8&um=1&ie=UTF-8&sa=N&hl=en&tab=wi
F40: http://images.google.com/images?hl=en&client=safari&rls=en-us&um=1&sa=1&q=ferrari+f40&aq=f&oq=&aqi=&start=0
F50: http://images.google.com/images?hl=en&client=safari&rls=en-us&um=1&sa=1&q=ferrari+f50&aq=f&oq=&aqi=&start=0
F430: http://images.google.com/images?hl=en&client=safari&rls=en-us&um=1&sa=1&q=ferrari+f430&aq=f&oq=&aqi=&start=0
Testarossa: http://images.google.com/images?hl=en&client=safari&rls=en-us&um=1&sa=1&q=ferrari+testarossa&aq=f&oq=&aqi=&start=0
And then just go to wikipedia, and look at all the other ferrari models and search them, until you find a pic of 'your' car!
Hope this helps, sorry I coudn't I.D. the car for you!
Peace