“I really was in a dark place there for a while and it wasn’t an easy journey back,” the 26-year-old actor tells Vulture. “There was a time there where I didn’t know if I would ever do it again.”
“That thought scared me,” he adds.
While filming a stunt for The Death Cure, O’Brien was thrown from a moving vehicle and struck by another. The accident caused serious damage to his face, and he was transported to the hospital shortly after.
"The state that you're in after something like that, you just want to run from all that stuff," he shared. "I didn't really even want to leave my couch necessarily when I was allowed to, so yeah, it was a big step doing this."
"I ultimately decided that I wanted to try it and I didn't want to let it go," he added. "[The movie] ended up being really instrumental in the whole process."