Derek Paravicini was born three and a half months premature and complications caused his blindness and affected his brain causing severe learning disabilities. He is also severely autistic.
But with incredible talent, and a lot of practice and hard work, he became a concert pianist by the age of 10. He has perfect pitch and can play a piece of music after hearing it only once. It's hard to describe, you simply have to watch him. Like on the video below, watch from about 14:20 mark for about 2+ minutes - he can hear 50 orchestral instruments at a go and replay all their notes instantly! Wowwww