Complex sentence: Berenger is devastated at witnessing her death and flies into another panic in which he considers just giving up and joining the rhinos; he tries to turn into one of them but is unable to and bursts into tears at his inability to convert.
Split into simpler sentences: Berenger is devastated at witnessing her death and flys into another panic in which he considers just giving up and joining the rhinos. He tries to turn into one of them but is unable to and bursts into tears at his inability to convert.