Quote Originally Posted by Vincent, Thunder God View Post
There's a flashback in the Icicle Inn town where you can see more of Aerith's mother's past - I think it's triggered by a lever in a lab or something. I forget the specifics but sometimes when I would tell people about it they'd never heard it was there and were surprised.
It's in Professor Gast's house in Icicle Inn, there are several video logs you can watch.