[Cross tilts his head as he can see Korra's visible frustration. He looks to the spinning walls and back to her. It's not hard to figure out what she was trying to do. But he does listen to her when she starts getting more frustrated.]

You know, it's okay to be frustrated over whatever you're trying to do. But what's important is that you don't give up.

[He hops over the fence to examine these walls.]

Soooo...what were you trying to do?