Goblins were known for being extremely clever and cunning. Despite this fact, a look of surprise was visible. This was an unusual turn of events. "Everything is perfectly safe here at Gringotts." he said, immediately, as if out of habit.

Everything was probably perfectly safe. As far as he knew this was the only time this had ever happened.

Being good at his job, the goblin knew exactly where they were. "We'll get off here." Yes. In the middle of the track in the middle of the cavern. "Around that bend is your vaults." They'll take a different cart and a different track back. He would then report the issue to Sturnik.