It's the follow-up that clues them in, Chip looking from the Knight over to the shore, and...oh wow, they are kind of far out, aren't they?

"O-oh, uh..."

They pull an embarrassed grimace, and nod shyly.

"Uh...thank you. I didn't, uh." God, this is dumb. "Do, uh, do you need help back...?"