they're doing the "ul ji ma" (don't cry) chant
well, jongdae's doing it correctly.

minseok, on the other hand-
"ul-eola" ( just cry)

minseok be thankful i still <3 you

but i think the funniest bit is yixing's expression

edit: however, minseok looks really pretty when he cries... like his beautiful eyes become sparkly with tears lol (ik i'm evil)