crashing

So, bounding and crashing and whooping and yelling, the whole tribe of Bandar-log swept along the tree-roads with Mowgli their prisoner.

Then she swayed, lost her balance, stumbled, staggered, and fell, sliding down over the sun-baked roof and crashing off it through the tangle of Virginia creeper beneath--all before the dismayed circle below could give a simultaneous, terrified shriek.

Or had some sudden blow from her hand dashed the support away and sent the slab crashing down into its place?