Earlier this month, John Bernecker, a 33-year-old stunt performer and fight choreographer, died after suffering a serious head injury due to an accident on the set of The Walking Dead in Atlanta.

The incident occurred when Bernecker was practicing a fight scene and lost his footing, causing him to fall off a balcony that was more than 20 feet high and onto a concrete floor. He was then transported to Atlanta Medical Center via helicopter where he was reportedly placed on a ventilator. The decision to remove him from life support was made shortly after and the official cause of death given by Coweta County Coroner Richard Hawk was the blunt force trauma he suffered in the fall.

Bernecker was one of the most prolific stunt performers in the business, with over 100 credits to his name in the past seven years, including The Hunger Games, Logan and the upcoming Marvel movie Black Panther.