From right behind Sofia's little tomb there was a rumbling of rocks, and then Toph poked her head out.

"C'mon. There's a tunnel here, we can get you back under cover. Big lizards... you don't want to mess with big lizards."

Whereas above ground it was patently obvious that Toph was blind, here underground she carried on as though this were a completely normal state of affairs.

"We need to get back up and help the others."