more and larger pieces of debris were falling out of the sky now , some flung out of the craters depths as the volcano dug deeper to belch out the increasingly graphic contents of its raging , subterranean stomach , like a chronic indigestion sufferer struggling to control a churning gut ; other items were showering down from the tower of black power itself , as the series of small earthquakes which had accompanied the eruption had evidently resulted in sufficient structural damage to cause the new tower to tremble .