It's funny that they changed the line in the West Side Story, because the original was:
'I feel pretty, oh so pretty,
I feel pretty and whitty and gay'
But then "gay" meant happy.
Norbert Leo Butz quotes about John Lithgow: "He's really clumsy. One of the joys in life is to watch a great big huge man totally wipe out backstage. It takes John about three minutes to hit the floor. It's like watching a Great Sequoia falling gracelessly."