Why so serious Kyungsoo?
I was watching [2015MAMAxMPD] EXO 비하인드 스토리 BEHIND STORY 151211 and I see Kai and Sehun practicing the lightsaber dance with the actual lightsabers and then I see Chanyeol jamming out to something and then BAM
KYUNGSOO LOOKING MAD AS HELL.
TBH Kyungsoo was probably just jealous of SeKai's couple dance.
Just kidding! Kyungsoo has mentioned before he has bad eyesight so sometimes he stares at people or things like that.