The immense roaring literally leaped on him from behind, and in the roar, his senses were drowned.

He could feel his knees weaken and buckle, but the cliff, now just before him, gave him fresh strength.

But was the cliff high enough?
He hurried up to higher ground and flung himself prostrate.

The front of the slide was cutting down the heavily forested slope as though the trees were blades of grass before a keen scythe.

The noise passed all description.
Once he thought the mass was changing direction.