Haruka, Makoto, Nagisa, and Rei swim in their individual events.  Rin becomes irritated as he remembers watching them swim back in grade school.  Afterwards, the four Iwatobi Swim Club members must prepare for the medley relay.
It must have happened when he dove in.
Das muss passiert sein, 
als er eingetaucht ist.
Se le movieron al momento de lanzarse...
Se le han movido al lanzarse...
Ça a dû arriver 
lorsqu’il a plongé.
Deve essere successo quando si è tuffato.
Deve ter acontecido quando
 ele pulou na piscina.
Должно быть, они сползли,
когда он нырнул.