David Draiman is the lead singer of the heavy metal band Disturbed.
They're know for some pretty heavy songs. Draiman's typical vocal style involves harsh, loud screaming.
So when the band stepped onstage to perform on Conan earlier this year, the audience probably thought they had a good idea of what they were in for.
Little did they know.
The lights fell and a piano began to gently play the opening of Simon & Garfunkel's "Sound Of Silence."
When David began to sing? Shivers.
