Mumei and the others are thrilled with a sudden pool day. However, their joy turns to horror when shadowy figures appear in the water. Sharks with plans of world domination? How can this be? With no possible escape, how will Mumei and the others cheat their way out of this new challenging test?
Didn't you humans invent that saying?
ألم يكن مبتكر هذه المقولة أنتم البشر؟
Ist das nicht ein
menschliches Sprichwort?
¿No es lo que dicen los humanos?
¿No es lo que decís los humanos?
N’est-ce pas vous, humains,
qui avez inventé ces mots ?
Non lo dite sempre voi umani?
Não foram vocês, humanos, 
que inventaram essas palavras?