A beaver chews on a tree down to it having no middle but it still doesn't fall. Another beaver ignores what is happening.
Trees typically fall after being cut down to the middle.
Why does the tree not fall?
I'll go see what's holding things up.
scene: forest description: A beaver chews on a tree down to it having no middle but it still doesn't fall. Another beaver ignores what is happening. uncanny: Trees typically fall after being cut down to the middle. 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.