Michael Lucas, who was in the audience for Rivers' last show Wednesday night, told CNN that she joked about death.
"She said, 'You know I'm 81 years old, and I could drop dead at any moment and you would be so lucky because you will have a story to tell your friends for the rest of your life,' " Lucas said. "Then she mimicked people talking about what it was like to see her drop dead on stage."
Joan's daughter Melissa released this statement today.
"On behalf of my mother and our family, we are extremely grateful for all the love and support we've received," she said in her latest statement. "At this time she does remain on life support. I know my mother would be overwhelmed by the continued outpouring of kindness and I want to thank everyone for keeping us in their prayers."