This was a joke but ended up being a very cool test on optical illusions. A former co-worker found this skull printout in the trash at work (recycle bin) and I thought it would make a cool mask, so I poked out some eye holes, put it on my face and placed my glasses over it. This is what I got when I took a selfie. It looks like I'm wearing a skull mask but it's really a flat piece of paper. The photo came out JUST right. (not for sale)