Get a behind-the-scenes look at our newest episode of Ryan Shazier’s #50Phenoms!   A former professional wrestler, Chris Hahn experienced severe headaches, ongoing blackouts, and other symptoms. Believing his symptoms stemmed from concussions, he enrolled in a concussion study at UPMC.   “Being a professional wrestler and being an athlete my whole life, I’ve always thought I was invincible. Nothing could hurt me,” he says. “And so when I’d get these headaches, I always thought they’d go away.”   It turned out that his problems came from a different source: a brain tumor the size of a tennis ball. The study helped him get in the door at UPMC, where an innovative surgery removed his tumor and cured his symptoms. Today, Chris is an actor and stuntman. Watch the full story at upmc.me/shazier or at our link in bio.