It is John who finds the pocket of air. John, who has never needed to think through all the possibilities to reach a conclusion before acting upon it. John who kicks away the metal strut that has pierced skin and muscle, risking major blood loss in favor of dragging Sherlock's nose and mouth where they can operate as designed. John who is performing an impromptu variation on the theme of resuscitation, pressing intermittently against his diaphragm as if to remind it how to operate. John who is gasping into his ear. "Sherlock, breathe! Breathe, God damn you! Dead is boring."