This actually happened a couple years ago, and to answer everyone's implied questions, yes he is now my ex, yes this incident was the catalyst, yes I called the cops, and yes I got the car back! After standing outside for a few seconds with my jaw flapping in the wind, then realizing my phone was in the car to top everything else off, I went back inside and had the attendant dial the local cops. Since I knew the make, model, license plate, and rough direction where the cockhole was going, it was pretty easy to track down. He did have the audacity to call me and ask (demand, actually) that I bail his ass out, but I laughed and hung up. I ultimately wound up dropping the charges, since his parents are very well-connected in their hometown, and I knew the lawyer they got him would have been able to get him off on probation or something equally pathetic. But mostly I dropped them because the family was wealthy and vindictive enough that I could have seen them suing me (!!!) to get back the cost of the lawyer's fees, and once it was all said and done, I just wanted a clean break. He had some mental health issues (depression, alcoholism, longtime unemployment) going on way before this, and I'd been weighing my options for getting out for a while. At least his real-life GTA5 enactment gave me the chance I needed!