One Piece Chapter 35, page 4: THE STEEP SLOPE AGAIN

Usopp and Kaya scream at the kids to stop. Jango and Zoro look on, bewildered by the children's reckless actions. The kids finally stop, deciding to show Kuro "mercy," and turn to Usopp, demanding to know why he didn't tell them he was fighting. They argue over whether his secrecy was "disloyal" or "dishonest."