Derek, 39, cracked his head on the bottom of a shallow pool. He lost part of his memory and 30% of his hearing. Four days later, he sat down at a piano. He could not read sheet music. He could not play “Twinkle Twinkle Little Star.” He improvised complex original music for five straight hours. Doctors diagnosed acquired savant syndrome: a brain injury that unlocked something hidden. He sees black and white blocks moving in his head when he plays. Twenty years later, he is still performing. What talent is sitting behind your worst day?