As I've shown previously in Hughes, when Mr. Oswald lowers his right arm and leans slightly west after drinking from the bottle, interesting reflections appear momentarily in the glass entrance behind him.
YELLOW ARROW: The reflection of Mr. Oswald's right shirt sleeve
PINK ARROW: The reflection of a portion of the flag he is holding behind him in his left hand
But that's not all. The reflection of the piece of flag (orange arrow below)
appears simultaneously with the actual glimpse we get (NOT a reflection) of a higher portion of the flag just behind Mr. Oswald (blue arrow below).
Look at these THREE things that appear, just as Mr. Oswald lowers his Coke and leans a little west:
The fact that the appearance of these three phenomena coincides with Mr. Oswald's movement is no fluke.
His movement is what's making them come momentarily into view. All three phenomena belong to him.
We are but a moment away from the flag being whipped out and waved energetically at Pres. Kennedy.....................