The form, invented by Marilyn Singer, is described by the poet in this way.
A reverso is two poems in one. Read the first down and it says one thing. Read it back up, with changes just in punctuation and capitalization, and it's a different poem.
Here's an example Singer provides in her note about the form.
The coolest thing about these is that whether you are reading them forwards or backwards, they work! You can learn more about the reverso and the book that started it all by checking out this post at Seven Imp and this post at Writing and Ruminating.
So, what do you think? It seems an impossible task, but perhaps we could try writing some short poems similar to Marilyn's example. That, my friends, is the challenge. Please share a link to your poem or the poem itself in the comments.