After the jedi council gives Anikin his first assignment (guard Padma) Obi-won, Mace Windu, and Yoda are talking and walking. Obi tells windu and Yoda that Anikan's abilities have made hime arogant. Once the camera focuses on Yoda and he begins his line about it being a more common trate of young jedi's you see it over his right hand shoulder. In the distance you see what appears to be a long caped person walking. The uniqueness of the scene is that the building appears, from other shots in the same scene to be full of Jedi's. The only place there is just one person walking is behind yoda. After seeing the movie for a 3rd time I feel confident that that seen was met to be a foreshadowing of vader.