An optical illusion involving a brick wall has gone viral after it was posted on Facebook earlier this week.

At first glance, it's almost impossible to see it.  But once you see it, you'll kick yourself for having missed it at all!

If I'm being honest, I probably stared at this photo for at least five minutes before I gave in and found the answer (which I've posted below the post).

But it turns out I'm not the only one who had trouble with this optical illusion as it's been frustrating and confusing people across Facebook and the internet the past few days... Now go ahead, you try it!

Still stumped?  It's OK, I totally was too.

Now look at it again — and try to spot the cigar that’s poking out from between two of the bricks.  Aaaaand, now you see it!

You’re welcome.  Now you can carry on once again with your day.

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