“They call him Doomgod, the one who can kill blindfolded. He defanged the Cobra and snuffed the magician known as Merlock. But Dennis Fong, 19, is no Terminator. He’s a popular student at the community college in Los Altos, Calif., where he lives with his parents and does (most of) his chores. So why does he go by the name Thresh, as in threshold of pain?”