Sgt. Demetrio Lopez Garcia : [after the church's bell mysteriously rings] Contreras! Why did you sound off the alarm?
Contreras : I did not ring the bell, Sergeant.
Sgt. Demetrio Lopez Garcia : Someone did. Who's up there with you?
Contreras : No one, sir. It rang by itself.
[Bernardo aims a tiny rock from a slingshot and it touches the church's bell in order to mysteriously ring for the second, but final time]
Contreras : It rang again.