anyway if the buggy didn't break down for that reason, i'm sure they would have added some lines for Barret to convince the others to go with Nanaki, considering he adores the place as the birthplace of the original Avalanche, so much so he decided to take the name for his own due to a high respect for the original Avalanche, too bad he never realized that Avalanche was partly responsible for the burning of Corel... so i'm quite certain, that would have been a viable option but they went with a breakdown instead as a means to really make sure you're trapped there for some story, instead of just rolling away straight onto Nibelheim...