His powers manifested while he was at a school dance while some kids were bullying him. Lost control and it didn't take long for Sentinel Services to come after them. Sentinel Services came after them and they came to the Underground for help.

He's a good kid. Proud of who is and really protective of his family. He came with me when I left the Underground. [ There's a hint of guilt in her voice there. ] He was with me when my daughter was born.