Plot: Featuring a man who stabbed himself in the leg after using a carving knife as a mic during an impromptu karaoke performance; a woman who nearly lost her fingers when she mangled her hand in a printing machine; a plumber whose massive reaction to a wasp sting left him covered in bizarre blotches; and a toddler with a staple stuck in her gum. Plus, how surgeons used part of a man's ear to mend his mouth after his jaw was decimated in a catastrophic car crash