There are two beavers. One gnawed a tree that is somehow in the air. The other one is walking away.
There is a tree in the air that the beaver cut.
Why is the tree cut up and in the air?
I'll go see what's holding things up.
scene: forest description: There are two beavers. One gnawed a tree that is somehow in the air. The other one is walking away. uncanny: There is a tree in the air that the beaver cut. entities: Beaver, Logging. caption: I'll go see what's holding things up.
A play on the term "holding things up" --- usually, if something was held up figuratively, an action/activity would be delayed: here, the delayed action is the tree not falling over (which a beaver might want to build a dam). But, the second meaning is more literal: the thing causing the delay is literally something holding the tree physically up, i.e., "holding things up". So, the second beaver is going to see what is physically holding the tree up which is causing a figurative hold up.