Renbe: Yeah, about the thumbs.
Kat: Why do they collect thumbs?
Stefano: They don't. I do.
Renbe: You cut off their thumbs?
Renbe: Aw, come on!
Stefano: How else could these bodies by positively identified by the authorities a thousand miles away from here?
Kat: It's genius.
Stefano: Thanks. I try.