It appears the internet has actually run out of optical illusions to share, so until an artist like Dudolf creates a new one for us to stare at we're staring at this brick wall illusion that made the rounds in 2014.
See if you can figure out what's stuck in between the bricks in the wall before you scroll down to see the answer below.
This is definitely one of those “illusions” that can't be unseen once the answer is revealed, since it's something our eyes have trouble processing so once they're told what to see they see it every time.
Anyways, enough stalling, here's what's stuck in the wall:
It's a cigar! Did you see it immediately or did your eyes keep telling you it was a crack in the brick with some little gray thing sticking out? Yeah, same here...
-Via Boing Boing