This is a wonderful thing, my teacher had in issue like this when he was a baby he told us that one of his kidneys broke down as a baby and then the other one was to weak but a man he didn't really know sacrifised his life for him even though the deasese he had stayed there forever and sinse then his friends called him the chanced or something. :) Very nice teacher, He was so joyful and never yelled... I'm so happy theres more people that are so much like a hero to others/complete strangers!