Joe sighed due to two reasons; one, he wish he didn't hear Kilii's life story and two, she wouldn't tell him how one could become one of Them.
"Well," he said, sighing afterwards, "'dats a shame then. Cause you know...I'm already kinda' dead 'ere! So the information wouldn't be much use to me anyway! Ya' sure ya' can't just tell me in private somewhere?" he asked once more. Silly~