Right before you fight (SPOILER)Yu Yevon and Tidus says he will dissapear after you beat him and Lulu for the first time has a face and says "What are you talking about?!"

The Yunalesca scenes too. That whole part was great, I thought it was the end of the game the first time I played, because I knew that FFX-2 was coming and before the fight, with all the static and crazy camera, and all the characters saying something, it was truly climactic.

Third place goes to when Kimahri faces Biran and Yenke. I love Kimahri's/Gagazet's theme song.