Despite his goofy image from Running Man, Lee Kwang Soo has shown his vocal skills on a couple of occasions. Yoon Shi Yoon has sung a couple of OSTs, which demonstrated his soft vocal tone. Yoon Shi Yoon has performed on music broadcasts before, but it was due to his role in the drama, Hit the Top. 5. Place the radish slices in a glass jar and pour the hot liquid over top.