1-When Garland says "I shall knock you down" (of course that was more of a "holy s**t that's funny moment." )
5-when Galuf died in 5. I was hoping I didn't have to go and do the whole job and level thing over again.
When Exdeath used the void 0_0
6-when kefka nearly killed everyone... Kefkas still cool though.
7- Aeris getting killed
8-um...
9- KUJA! KUJA! KUJA! (does that get the clue through? i'm still not quite sure whether it's a man or woman...) ultima
10-The whole Giga graviton thing sin used.