I found one. Finally! The sad part is, it most likely wouldn't save any time in RTA. When Petrified Woods is unlocked for the first time, there's a staff member there and a cutscene trigger in front of her where she says Joe told her to let you go. You can skip over this trigger by clipping into the diagonal part of the wall and making your way to the left, where you can go into Petrified Woods and dig up the Sardinisaurus rock like usual. The problem is, the cutscene is so short, if it were to save time, it would probably be less than a second. Sad. I was doing a lengthy "speedrun" of FFC NG+ and tried to "skip" every cutscene I could find, and this was the only example so far of where you could skip a cutscene and were able to progress the story afterwards. It's most likely TAS-only just because it's not worth it in RTA. But anyway, I'll be back in the Discord and everything on the 1st of November, and I have a time to submit then. See you guys then, and may RNGesus be smiling on you guys. God knows we need it.

-GuanlongX