Roy had a tense face, thoughts were confused in his head, his eyes were as if empty and there was a drop of fear in them. His face contorted into a more tense grimace with the dilated pupils of his coal-black apples, he clenched his jaw and pointed the gun under his own chin, intending to shoot himself, but it was difficult for him to take this risky step, making his hands tremble noticeably holding his finger on the trigger. In fact, Mustang is trying to commit suicide because of a task in which Basque Grand to kill the Amestrian Doctors Sara Rockbell and Urey Rockbell, branding them traitors for treating both sides in the Ishval Civil War... He didn't want that. By killing himself he would never have to obey unreasonable orders like that again.