On Labor Day Weekend a huge oak tree came crashing through my sister's house at 3AM. She was worried earlier in the evening when smaller trees in the suburban Philadelphia neighborhood were uprooted. In the middle of the night she woke up, told her husband she was sleeping downstairs because of her concerns. Just as he told her that she was being silly because the oak tree had stood for a hundred years, a crash came from the ceiling and he jumped out of bed in time to see a huge limb come thundering on their bed.