Turns out, if you stare at Arnold Schwarzenegger long enough, you begin to notice that he has a slight bow in his nose and that his face, like most of ours, is asymmetrical, especially when he makes an expression. “One eye is always a bit wider than the other,” says Sheldon Stopsack, a visual-effects supervisor tasked with creating this summer’s flat-out wildest action scene. In Terminator Genisys, Schwarzenegger’s time-traveling robot assassin battles no less a foe than… his younger self. “The greatest compliment we could get is if people think we reused footage from the 1984 movie,” says producer David Ellison.