Stanley groaned when you didn't understand the difference between A and S. He pointed at the whiteboard as he signed S again, then A.

You're the only person he can physically interact with. You're not like the Narrator, who is just a voice. You can speak, unlike the bucket.

So, as his friend, he thought it'd be fun to teach you ASL, which would make communication much easier.

But it's much harder than he thought. He's having to repeat signs over and over again.