We're all guilty of performing stupid stunts as kids, but most of us tend to avoid risking life and limb as we grow older. YouTube's Giaco Whatever has done just the opposite. Using his machining skills, he attached a bunch of razor blades to a high performance yo-yo, creating a toy that's possibly even more dangerous than lawn darts.
As dangerous as the yo-yo is spinning at the end of a long string, turning hot dogs into minced meat, it's even dangerous when it eventually climbs back up and does the exact same thing to your hands and fingers, so Giaco used a special yo-yo-ing rig to play with the toy. Kids, don't try this one at home — or really anywhere on Earth.