Ive been playing this for like 8 years all in all like 20 times and I saw a scene I never saw before. After scoring a goal Tidus did a backflip and raised his hands up and then Wakka came in early before the 3 minute mark. I think you have to be down at halftime and score the go ahead score between 2-259 min. Once you score the go ahead goal wakka will come in directly at that point and the time will fast forward to 3 min no matter how much time was left when you score.
http://www.youtube.com/watch?v=CTUhE-zzz1g
http://www.youtube.com/watch?v=CTUhE-zzz1g