San Diego police said a man tried to carjack a woman and her daughter at gunpoint on Sunday, successfully getting into the womanâs minivan and preparing to drive off. But as video posted to YouTube shows, a crowd of bystanders came together to thwart him. <iframe width="620" height="349" src="//www.youtube.com/embed/uH6FinWzI7Q" frameborder="0" allowfullscreen></iframe>