Can you figure out the bizarre illusion in this brick wall photo?
Leave it to the Internet to turn a nice brick wall into a source of anxiety.
Arron Bevin posted this old head-scratcher to Facebook on Monday. Now, it's recirculating around our fine Web, leaving pestilence and destruction in its wake.
Thanks a lot, Arron.
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Can you unravel the mystery of this brick wall photo?
Okay, we'll clue you in.
If you didn't see the cigar wedged between the second and third rows, you are certainly not alone. But now that you've seen it, you can't unsee it, right?
Such is the magic of this brick wall.
Now, go in peace.
BONUS: Can you find the potato in the sea of hamsters?
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Chloe was the shopping editor at Mashable. She was also previously a culture reporter. You can follow her on Twitter at @chloebryan.