The bridge was fairly far away. Maybe she wasn't aware he was there.
Yeah, I'm inclined to think that she didn't know what was happening up there.
That said, the whole "selfie" craze is just beyond asinine.
"...And these atomic bombs which science burst upon the world that night were strange, even to the men who used them." H. G. Wells, The World Set Free, 1914
"The one pervading evil of democracy is the tyranny of the majority, or rather of that party, not always the majority, that succeeds, by force or fraud, in carrying elections." -Lord Acton