Joan Rivers has often remained good-natured about her own love affair with plastic surgery, giving and receiving jokes with good grace as part of her colorful career. But don’t crack a funny on the subject of Joan’s daughter Melissa Rivers - sparks (and swearing) will ensue.

Rivers abruptly ended an interview and dropped TV’s biggest no-no live on the air when an anchor tried to joke with the celebrity who’s usually so great with one-liners. Watch the video - and your ears - if you want to see Joan melt down.