In order to find the truth about what happened, Tooru leads his father away from the group as they sneak into the lab.  But his father finds out what he's doing and sets an ambush for them.
That's who humans really are.
So sind die Menschen nun einmal.
C’est la nature humaine.
Gli esseri umani sono fatti così.
Humanos são assim.
Людскую природу не изменить.