Believe It Or Not, Joe’s Walking On Air.Tired of being handicapped, Joe decides to get a leg transplant so he can walk again. After the successful operation and excited about his new ability to walk, Joe dives head first into extreme sports, where he soon outgrows his friends and ditches them to hang out with jocks. Peter and his pals are upset by this, and become shocked when Joe's new lifestyle eventually leads him to leave Bonnie. Peter suggests to Cleveland and Quagmire that in order to get their friend back they must paralyze him once again.