from a movie site:

The only person I can remember that kind of tickles me is Peter Yarrow, who wrote a song called "River of Jordan." It's the one the stewardess sings as she's playing the guitar and knocks the IV out of the little girl's arm. That was a very serious song Yarrow had written for some serious occasion. But nonetheless, he sold it to these people to put it in a movie--[for] us--not realizing the context it was gonna be used in. So, it kind of came back later that he'd like to sue us, but he didn't.

Wolfgang