A Playground For Dolphins

I would make a playground for dolphins
Out of these disused train carts
Filled with rainwater

Imagine the joy of the dolphin
Leaping from one to the other
Imagine the look of surprise
On passersby's faces

What if this were God's intention for us
And the train was moving
And all we could see was the sky
And the undersides of bridges zooming by

It would take a leap of faith
To land in another cart
But we could barely move
Without hurting ourselves

What if this really is
All there is to it
A row of gray carts
Filled with dirty rainwater

The train grinds
Along the track
To its final destination
Before turning back

And all the exaltation
Is in the leaping
And all the insight
The view from the top of the leap