There was another movie scene that reminded me of that single “glance”...
In one of my favorite movies “Master and Commander”, when the HMS Surprise is anchors off a Brazilian coast to resupply and all the traders and natives come out to trade, there is one scene where, a moment after he tells his First Lieutenant (I think) to hurry it up so they can get underway, he pauses and looks down into one of the canoes alongside his ship.
There is a beautiful woman, could be Portuguese or a native, but she is dressed in European garb, and is looking up shyly from under her parasol at him. As he looks down, their eyes meet.
It is longer than an instant, but...the dynamic is the same. In real life, that shy, beautiful face looking up at him would have been held in his thoughts for a long time, I suspect.
That scene sticks in my mind too.
That, and 'in the service one must always choose the lesser of two weevils!".