Music can do this.

DIALIBA CISSOKHO, Kora player, cries as he plays and sings. For the non creative and impatient ones, just go to 8 minutes into the song to see the crying bit.

This is a lesson in how to play music if I ever saw one. All those puppets and X Factor type so called professional performers are LYING to us. It's about emotion. It's the blues.