[Prodigal Son]

Thanks. That's what I thought too. But when I first looked at it, my mind just read 'vertical' and I couldn't see it any other way after that. Plus I slept through those required six semesters of 'Analyzing Satellite Imagery of Saharan Sand Storms' so I was probably heading into this conundrum with a disadvantage ;-)

[Robert A Cook PE]

Please don't beat the conundrum too hard.

(Her roommate has a headache and the noise is gonna drive her right out of the convent....)

[Ichneumon]

Thanks. That's what I thought too. But when I first looked at it, my mind just read 'vertical' and I couldn't see it any other way after that.

It's hard to fight optical illusions (even when they arise accidentally in an image).

For example, the following is a static image, and is *not* animated. But try telling your brain that:

Plus I slept through those required six semesters of 'Analyzing Satellite Imagery of Saharan Sand Storms' so I was probably heading into this conundrum with a disadvantage ;-)

ROFL!!