Sakurako's refusal to hand over the skeletal remains of a human skull to the point since she found it first. Just her going tsundere since Shotaro called in it makes it even funnier.
"Where Do You Live?"
Hiroki's attempt to talk to the young girl in the koban was for nothing since he can't comprehend her at all.
Sakurako is not a morning person. Hiroki and Shotaro were yelled at for interrupting her sleep early in the morning.
Sakurako: Boy, I don't care what you choose to do with your own time, but don't drag me into it. I was putting bones together until [four] in the morning. What my body wants is not a conversation with you, but sleep.
"The Asahi Bridge Irregulars "
Shoutaro uses the festival PA system to find Sakurako after they are separated... by reporting her as a lost child.