Complex sentence: Cooper tells Josh he is not a failure and talks him down; when Josh comes down from the bridge he reveals to Cooper that he was faking his suicide attempt so the school wouldn't fail him, and Cooper would look like a hero to his father.
Split into simpler sentences: Cooper tells Josh he is not a failure and talks him down. When Josh comes down from the bridge he reveals to Cooper that he was faking his suicide attempt so the school wouldn't fail him, and Cooper would look like a hero to his father.