because the day before , when mommy told her she could n't go over to deenie 's house because she had n't picked up her room , charlie had got very angry , and suddenly the firething had been there , popping out of nowhere as it always did , like some evil jack-in-the-box , nodding and grinning , and she had been so angry she had shoved it out of herself and at her mommy and then mommy 's hands had been on fire .