I'm just gonna leave this here because it's just fun. Running Man fun!

BTW - The fist song is called "December" from Turbo, and in case it sounds familiar -Super Junior's KRY just released it as a cover. I just thought you should know. I love it! Also Ha Ha and Kim Joong Kook are hilar together - and then you have Kwang Soo and Jae Suk. It's all win really.