The countdown to Halloween is well underway, and puzzle expert Gergely Dudás is celebrating with a spooky brainteaser. At first glance, this illustration looks like a normal Halloween design, but sharp-eyed observers will notice that one figure in the crowd doesn't belong. His brainteaser for Halloween is more of a trick than a treat. The image above is full of white skeletons, with just a handful of orange jack-o'-lanterns breaking up the monochromatic scene. You can find the answer to the puzzle in the image below.