Dennis Quaid's Medical Nightmare

When they arrived at Cedars-Sinai the next morning, members of the medical staff were waiting with terrible news. "This started probably the worst day of our lives," Dennis says.

Watch Dennis and Kimberly recount their story.

The Quaids learned that nurses had accidentally given their children two powerful doses of Heparin, a blood thinner that's prescribed to keep IV lines clear and prevent blood clots. "They got a thousand times the dose of Heparin that they were supposed to get," Dennis says. "They were supposed to get 10 units of Heparin, and they got 10,000 units of Heparin—twice. That's when their blood turned to the consistency of water."

When the Quaids finally saw their babies, Kimberly says they were black and blue. "It was a bad sight," she says. "They were bleeding out."