In 1985, Rivers appeared on Good Morning America, where Joan Lunden asked about her heart arrhythmia, a condition in which the heart unexpectedly beats out of sync.
"All of a sudden you'll be on stage and hear 'tha-thud!' … It scares the hell out of me," Rivers tells Lunden in the video below.
Rivers then goes on to explain that the condition poses a very specific concern.
"When you go under, say for plastic surgery or something like that, that's when your heart can go out of kilter. So I'm always very careful," she says.
Despite the eerily prescient comments, Rivers was quick to return to the wisecracks that made her so beloved.
As Lunden points out that crash-dieting also posed a risk to Rivers's heart condition, the comedian agrees, but admits that she wasn't about to change her ways.
"I diet all the time," Rivers says. "If ketchup dropped on one of your children, you should not leave her in the room alone with me. I will eat anything."