She tells Kristoff the next time she sees him.

"I don’t believe you."

"Kristoff. I was sitting right there. It was like this never-ending…stream of meat. Like some portal to the meat dimension.”

"I’m pretty sure I can pick up your sister with one hand. Not that I would. Because that would be wrong. And bad. And, um, wait, this has nothing to do with this conversation. Anyway. Your sister is tiny. There’s no way."

So of course Anna has never been able to back down from a challenge (shut up, Kristoff, you totally challenged me), and invites him to dinner with Elsa one night. And Kristoff just kinda stares in disbelief.

"I am never doubting you again."

"Why are the two of you staring at me? Is there something on my face?"