well, can also come across pretty bossy and slightly unpleasant if someone responds to your post, but as said by you, no harm done I hope. I actually tried digging for their image archives, but could not find them, so suppose we'll have to stall till end June to see how the movie plays it.
My guess was; i) reflection of light, as you point it out. But also ii) some fresh snowfall and clearly sub-zero temperatures. I also believe a saw snowpatches in backlight, corroborating this.
Anyway, we will know more in July.