On the upcoming episode of “Superman Returns,” Seo Eon and Seo Jun visit a martial arts class and show off their powerful kicks and nunchuck skills.

As soon as Seo Jun enters the room, he masters the butterfly stretch and warms up for a training session. He surprises the teacher by throwing pretty quick punches with his adorable little fists. Seo Jun even laughs as if he’s saying, “This is nothing.”

Seo Eon, on the other hand, starts a bit on the comical side, first making waves with his stomach. When the lesson officially starts, however, Seo Eon does a direct hit on the mitt and shows off his charismatic side.

To see more of Seo Eon and Seo Jun’s martial arts skills, tune into the next episode of “Superman Returns” on September 13 at 4:50 p.m. KST.

Do you think they’ll grow up to love martial arts?

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