Slipknot Clown Mask - New Version The scariest band on earth is back with new featured masks. These Heavy Metal Rockers have upgraded their already scary masks to a whole new level. The Clown Mask is one of the characters to have gone through a more dramatic change. In his all black mask with metal zipper decorations and darkened lenses on the eye openings, this Clown looks a lot like something out of a Stephen King's nightmare.