Not sure I understand. So, here goes...you started the car, and the car took off? So, was the car in gear? If I am wrong, sorry. But, this could be a crankshaft position sensor. Crank and no start. I would start there. About $45 over here...not sure on your end what the cost is. It is an easy fix...There is even a how-to on here. Maybe someone better than me can link that up for you. If not, use the search feature, and search for Crankshaft Position Sensor...good luck...