Update June 16, 2016: Sharpie has responded to our request for a comment regarding the issue, saying "Sharpie is aware of this online challenge and we do not condone these actions. We believe that this phenomenon is not unique to Sharpie ink. Strong pulses of light, such as those produced by camera flashes, can transfer heat energy to surfaces including skin. Darkening the skin or other surfaces with inks, paints, and cosmetics can intensify the effect. Sharpie provides consumers with products for creative expression and these markers are not intended for writing on human skin."
The #SharpieShockChallenge: the latest internet fad to take Twitter by storm (You and I are going to make this a thing).
The premise of the Sharpie Shock Challenge is simple. Take any black permanent marker and draw a black box on your arm (or any other vulnerable body parts if that’s your thing) and worry about toxins while you take a picture with your flash on. Press the camera on your smartphone against the ink before snapping the pic.
Tada, you will feel a slight warming sensation that doesn’t quite qualify as a pinch, but enough to make a Snopes writer go back and question their judgement. Does it work? Yes. The black ink absorbs light much like the secret paint that the U.S. Air Force uses on its B-2 Stealth Bomber (it has iron flecks in it. Does sharpie ink have iron flecks? Nobody knows, because Sharpie hasn’t responded to our request for a comment).
Science! Now here is a page’s worth of young children hurting themselves on camera: