Okay, so lately I began wondering something: it's about Sasuke's chidori usage. When Sasuke fought Naruto (part 1) he suddenly remembered about when Kakashi told him that his limit was two chidoris, and if you try to force a technique that you don't have enough chakra to, it Will drain your chakra down to zero, in worst scenario you'll die; but when Sasuke fought Naruto he used chidori three times. He should have died during that third chidori, because his chakra should had reached down to zero?