"The man and woman never did settle in, and as Flight 462 began to taxi out to a runway, the man stood up, ignoring a flight attendant’s order to sit, saying that he had post-traumatic stress disorder..."

"A short time later... the plane shudder[ed] to a stop.... The man had forced open a cabin door, activating an emergency slide, and then he, his female companion and their [large service] dog slid their way out of the plane, officials said.... This was not the first time a panicky passenger has pulled such a maneuver at a New York-area airport, but neither Delta, the F.A.A. nor the Port Authority