Looks like she's having a nervous breakdown.
Actually, in 1983 I witnessed something not dissimilar at LaGuardia Airport. A very well-dressed, good-loking young lady had also missed her flight. She was pacing forth and back like a wounded animal. Her screaming and cussing could be heard accross almost the entire airport and she kept kicking and bashing the check-in counter. For a young lad, like myself, to see a well-dressed and groomed young lassie behave in this manner was very disturbing and I vividly remember the scene to this day. Of course, then and in true New York style, nobody paid her any attention. In those days one could have done cartwheels in the nude accross Times Square and people wouldn't have batted an eyelid. Come to think of it, that experience may have been pivotal in re-directing my sexual orientation.
Cheers
rapunzel