This is Greg.
Greg has been your best friend for many years, but an evil scientist abducted him and created a robot doppelgänger. Thankfully, you found Greg and stopped the evil scientists before he created a whole army of robotic Greg clones.
Now you face both Gregs, with a gun in your hand. One of them is the real Greg, while the other is the scientist's evil imposter. "It's him! Shoot him!" says the Greg on the right. "No, I'm the real Greg! Shoot him!" says the Greg on the left.
Left GregVia ThinkstockRight GregVia Thinkstock