I am really surprised by this. I always figured his primary nature was fire (b/c it was like a genetic uchiha thing), but he was capable of lightning. Now we see fire is his 2ndary chakra nature. Interesting. Were you all surprised? Itachi cant do lightning, so Sasuke really is strange to have that as his primary. And really, no one realized that and taught him before KAkashi? Fukagu, u messed up.