“I can literally still see that video in my head,” Stratton recalls in this week’s issue of PEOPLE. In the clip, he says, was what looked like a black triangular craft with orange, white and yellow lights glowing on each corner. It moved silently before seeming to defy the laws of physics by accelerating faster than the eye could follow — and was gone. “That,” says Stratton, “was the moment that changed my world.”