We observed a couple arguing, from above. In a balcony café at Heathrow. She gestured with her cell phone and indicated it to him a few times. Like it was part of the issue. He barely said a word the whole time, just hovered, facing her. Sometimes retreating a step or two, sometimes coming closer to her face. We speculated, something with another woman. It seemed to be a bit more dire than you were late. Sometimes it seemed she became depleted and spun around as though to walk away. But where would she go without him? They were together. Finally she walked to the departures board, for no real reason but to go where he was not. He waited a few beats, too proud to follow her like a dog. But then he did, and they walked off together where we couldn't see.