Impossible? No, just unlikely.
The nice short Pain Love ambigram displayed to the left displays the flexibility of the ambigram generator.
Since it is an ambigram, ambigrams really are ambi-guous depending on how you read them. This design can be read as 'Pain' one way and can be read as 'Love' the other way (or is it the other way around?).
For a mental work-out, try to read it upside-down without rotating it (you can mouse over it at any time to make it spin).
All items in the FlipScript store are already displaying the Pain Love ambigram. To see them, use the menu bar at the top to navigate to an item and every product will display the Pain Love ambigram.