Every once in a while a tattoo will come along that is so realistic, you begin to question whether it really is a tattoo. Most of the time this happens with small animals or insects that appear to be crawling over the skin. This piece by Viktor Sigil is definitely not a small animal. The middle photo in particular is the one that stands out. The black background helps give the tattoo the feel of an optical illusion, so if you focus your gaze on the middle of the photo, it seems as if his arm has been replaced by the machine.