It’s hard to believe his eyes. A French man stuck in a vegetative state since a 2001 accident began to show signs of life after doctors installed an experimental implant to stimulate his vagus nerve. Six months later, the 35-year-old is classified as “minimally conscious” and can follow movements with his eyes. He reportedly even cried in response to music. Researchers hope this high-profile case could help secure funding for clinical trials — and potentially change the lives of the millions who sustain traumatic brain injuries every year.