Here is a hillside before a landslide: trees on the slope, and a road along the valley floor.

Before: trees on the slope, a road along the valley floor.

Then it rains for days. Suddenly a mass of soil and rock slides down the slope, trees and all.

In less than a minute, the sliding stops.

Where the soil was, the slope now has a bare brown hollow.

Where the soil went, a heap of soil and rock lies on the valley floor.

The road is under the heap.

After: a bare hollow on the slope, and a heap of soil and rock on the valley floor. The road is under it.

Before and after: the landslide took less than a minute.