I spent hours upon hours playing this game with my brother looking over my shoulder. We used to take turns reading the lines and whatnot, so we got really into the game.

So the the scene in question kind of played out like this.

*Cloud finds Aerith kneeling at the altar*
Me: Good, now she can call holy.
Brother: You know, that was almost too easy...

*that scene where Cloud's fighting to not attack Aerith with his sword*
Brother: O.o ....What are you doing? Stop trying to attack her and finish the scene.
Me: I'm trying...! *frantically pressing the directional pad and random buttons, which only made it worse*

*Cloud finally backs off, both my brother and I were kind of like whew, but wtf at the same time*

Enter FMV. Aerith turns and smiles, and we're trying to figure out what's going on, right?

Me: Hey...what's that black spot coming down from the sky?
Brother: Looks like Seph---

*SHING! Sephiroth lays waste to Aerith*

Aerith: O.O
Me: O.o
Brother: O.o

Mysterious materia falls out of Aerith's hair and bounces into the water, complete with sappy music.

Me: O.o
Brother: O.o

By this time, Sephiroth is talking...you know, the icon box pops up? Only the icon box stays there for like five minutes, because I was too shocked to press the x button. Sephiroth's ensuing spiel pissed me off, I beat the snot out of Jenova, and we bury Aerith.

My bro was especially pissed because we named Aerith after his then-current girlfriend. xD But yeah, bottom line is that I was traumatized for at least two days afterwards.