You entered the Bone Pit arena. It's a place where everything is like desert and it's hot, but there are 2 bridges from 2 flangs through the gap. Yet it's a place where there lives the Bomber and the Cannoneer. They're not alone, Giant Skeleton is with them. Giant Skeleton saw you while he's strolling on the arena. He approached you and greeted you with using his gestures: "Hello, what are you doing here?".