Billy Joel is detailing his complicated relationship with his dad in his new documentary 'And So It Goes,' including the time his father 'knocked me out' as a child for playing 'Moonlight Sonata ...

The "Piano Man" is recalling a moment in which he was knocked unconscious by his own father after putting his own flare on Beethoven’s "Moonlight Sonata." ...

Artur Pizarro plays Beethoven's Piano Sonata No. 14 in C sharp minor, Op. 27 No. 2 (Moonlight) ...