Last November a 24-year-old Bay Ridge nursing student, Vivian Tran, helped save a man after he collapsed on a subway platform. The 63-year-old John McDermott suffered a stroke and was allegedly dehydrated from chemotherapy for cancer—Tran revived him when she noticed he had no pulse. Apparently looking to get on the subway hero reunion track, the Daily News has now introduced the two to each other, months later. McDermott—a security guard for the Metropolitan Opera—tells them, "God, I was lucky. She's my guardian angel. I had a funny feeling someone did something." Handing Tran flowers, he told her, "I never knew you existed. Thank you."