I took the post-ultimate step
The one past the top of the stair
That you take when you know
There’s a step yet to go
When really, no step’s there.

Somewhere between plan and forget
I planted a foot in mid-air
Then I stepped up and stood.
Now I’m stuck here for good,
On the step past the top of the stair.

Image: detail of Stairs to Nowhere, by Flickr user Mike Towber, published under a Creative Commons Attribution-ShareAlike 2.0 Generic (CC BY-SA 2.0) license.

One more for National Poetry Writing Month.