Often! I don’t Smile at silly things at all. Sometime I am serious on that day .That’s why when I saw this video, my first thought “Really it was?” It will change my mod. It will started automatically playing through. And even I was hopeless from there. I will become curious at the response and decided to play itself… At 36 seconds, I found myself full-on smiling. After 50 seconds all people becomes joyful. Because of their dancing style.