Boom Boom

Teenager Tabitha Smith had not gotten along with her parents for most of her life.[5] Her powers emerged when she turned thirteen and entered puberty. Aroused by Bret McAllister, she accidentally blew the roof of her school's lunch room.

Her parents were appalled. Resentful towards her father, Marty Smith, Tabitha put a small explosive ball of energy in his food. In retaliation, her father beat Tabitha severely. Somehow, learning there was a school for mutants in New York's Westchester County -- which was, in fact, Professor Xavier's School for Gifted Youngsters, headquarters for the mutant super-hero teams X-Men and New Mutants -- Tabitha ran away from home, journeying there by train and giving herself the code name Time Bomb.