Papyrus shoots the complete stranger a thumbs up. It might seem like a weird request to some people, but not to him. Maybe they want to play fetch! Maybe they're hungry, but want to exercise so the food doesn't throw off their diet! Who's he to judge??

He moves himself into a proper and dramatic-looking battle stance with his basket of barbecue ribs at the ready, and calls out to them.

"Are you prepared? These are sticky! And gross! And getting a little bit cold. They might fly wildly through the air, without magic to guide them!"

Before Peridot can answer, he flings one. The important thing is asking the question, not waiting for an answer.