Joony teases the trio's while watching their performance on the rooftop.  Suggesting they should try to be more like the famed street dancer, Chinu 
Open the door, the door!
‫افتح الباب، الباب!
Mach die Tür auf!
¡Abre la puerta!
¡Abre la puerta!
Ouvre les portes ! Ouvre !
Apri la porta! Apri!
Abra a porta!
Открой дверь, живо!