Cal smiles, mostly to reassure Enzo, partly to encourage. "Pretty much what I said. Kids get dressed up in their costumes, and their parents - well, usually their parents - take them out Halloween night to go around the neighborhood and knock on doors. When the doors are answered, the kids say, 'Trick or treat!' and people give them candy. I don't really know where it all comes from, but it's been a tradition for a long time."

See? It's fine.