people have said they have laughed themselves to death.
On a more serious not, Norman Cousins detailed his defeat of several illnesses using megadoses of Vitamin C, along with a positive attitude, love, faith, hope, and laughter induced by Marx Brothers films.
He said, “I made the joyous discovery that ten minutes of genuine belly laughter had an anesthetic effect and would give me at least two hours of pain-free sleep. When the pain-killing effect of the laughter wore off, we would switch on the motion picture projector again and not infrequently, it would lead to another pain-free interval.”
He wrote several good books on the topic, including “Anatomy of an Illness” and “Mind Over Illness.”
He died in 1990, having survived years longer than his doctors predicted: 10 years after his first heart attack, 26 years after his collagen illness, and 36 years after his doctors first diagnosed his heart disease