When is a NERF gun not just a toy? When The Hacksmith gets his hands on one of them. To be more specific, it shoots red hot ferrocerium, which explodes on impact into a cloud of sparkling shrapnel in excess of 3000° C. How does it work? It’s basically an air gun that shoots a custom over the barrel ferrocerium dart, heated by a 1000W induction coil until it is glowing red. The key to not getting burned is a string from the trigger to trip the quick release valve. Click here to view the first image in today’s viral picture gallery. Continue reading for the five most popular viral videos today, including one of five everyday inventions you didn’t know came from DARPA.