At Helm's Deep that great mass of Orcs is just a dead heap in the morning and a "forest" has appeared out of nowhere, just standing still.
Would be kind of interesting to know just how they did it -- though mystery follows Ents and hurons (sp?) wherever they go and whatever they do.
On one of the 'Ring" sites, I was ready a Spoiler that said we will see the destruction wreaked by the Ents/hurons instead of having it relayed through commentary. Now that sounds just dandy doesn't it?