Martial Arts! Or so I thought~?

In the Korean comments

One commenter turns the clip into a tiny story, writing, in translation, “It looks like he suddenly remembers mid-challenge, ‘Oh, right… I have homework.’”

What the words mean

A commenter calls Kyungmin’s brief dancing 쫄깃한 (jjolgit-han, literally “chewy”). Applied to movement, it means his dancing looks satisfyingly springy and controlled; the wording is casual and affectionate.