It's one that's going to make your brain hurt, this.
The folks at US car blog site Autoblog, for reasons best known to themselves, recently posted this photo of a backwards Nissan GTR on their Facebook page, with the glasshouse flipped around via the magic of Photoshop.
The resulting mutated madness was then picked up by the guys on the Final Gear forum, and those with plenty of time on their hands and too much imagination for their own good have created some occasionally wonderful and often genuinely mind-hurting virtual machines.
We often don't know whether we're coming or going here on PH, and some of these pictures really don't help - one or two of the office staff even had to go off for a quiet lie down in a darkened room after looking at them for too long - but it's pretty intriguing stuff.
We've posted the highlights here, but now is surely the time for the collective genius of PH to get on the case and join in with the latest internet craze - so get 'shopping, chaps and chapesses, and show us what you've got...