Jane, still in the distance, couldn't make out Hua Jian's expression, but she felt the change in him.
If one must be specific, it might have been his body language that conveyed his thoughts.
"I'll wait here! You keep going," Hua Jian said to Jane.
If his guess was correct, then only one of them could leave, unless someone new came in; otherwise, one of them would definitely be trapped in the photograph.
From the actor's perspective, this wasn't exactly a dead end. Quite simply, the Quan Yun Apartments had many other residents who weren't actors, and so, when necessary, they could choose to sacrifice these people.
Although it was somewhat morally inappropriate, in the face of life and death, actors wouldn't adhere to conventions.
To an actor, the other residents were nothing more than characters in a movie, each with their own destinies, but however much those destinies might change, they could never break free from the movie itself.