Squirrels

I took a walk around the neighborhood with my mother this evening.
As we passed near a large tree, we heard the noise of many small objects falling through the branches and striking the ground.
Squirrels ran around through the tree branches, knocking down acorns.

Now, do you know why the squirrels knock the acorns down from the trees before gathering them up?
It is exceedingly difficult to scamper about a tree while holding on to your nuts.
That's why.