At the end of the night, five contestants emerged. The only criterion was that the car had to run when light was shone on it. The fastest car, which resembled a racecar, almost sped right off the table when it was hit with light. Prototype 3's car was not the most aerodynamic (and was weighed down by the beer), and inched forward, just barely qualifying. And, despite its tendency to veer sharply to the left, a car designed to resemble a Brooklyn brownstone, complete with a front stoop and tree, was a favorite. "It's a solar powered mobile home," exclaimed Colin Weatherby, one of the judges, and the lead educator at Solar One.