. >> when adela akers retired from teaching, her work took the subtlest of turns. >> adela akers: i hadore time. i could indulge in just experimenting more. >> marc bamuthi joseph: you arrive like mandela released. >> and the work and words of marc bamuthi joseph. >> marc bamuthi joseph: i want you to think about one moment in your life when you think you were behaving normally and got in trouble for it. >> this time on spark. [ ♪music ]