There's already so much to see. As much as he'd like to go home, Donnie's still openly curious about his new surroundings. So this is what it's like, topside!

He points at various buildings and things, asking Leo what they are. Whenever they come across any people he burrows against his brother like he's trying to hide, and he probably is, not wanting an repeat of earlier.

And then Leo says some magic words, and the little turtle's face brightens instantly. He nods so eagerly he almost falls over.