what could happen? dr. devi, associate professor at the nyu school of medicine. we're all pulling for her. she has been overdrive recently. schedule with the new "star wars" movie, doing lots of interviews. she is in london promoting new memoirs. there is something no more perhaps concerning than being stricken on an airplane in mid-flight. >> sure. she is very, very lucky to be alive. not just for the that she was on the plane but the fact her heart stopped. they had to start cpr. means she had no pulse and the heart wasn't pumping. very few people survive something like that. this is somewhat miraculous for her. eric: they say 15 minutes before the plane got into lax. a nurse on board performing cpr. the pilots radioed ahead paramedics at gate dealt with her. reports say she is on ventilator now at the hospital. family is saying she is stable. if she stopped breathing for pen minutes and you're on a ventilator, what does that mean? >> there are two things.