Right. So, the Western Air Temple. So apparently while we were escaping, Zuko comes following after us in War Balloon all on his own. A few days later.... [And Sokka explains Zuko's fail attempts to get on their good side, including how Toph got her feet burned, Appa licking him, and so forth. He'll go into what he remembers of Zuko's explanation for being unhappy and his choice to help Aang, although Sokka's explanation of that is admittedly poor.]