Apple Talk Mystery Photo [u]

Here's a minor mystery that has me stumped.

The group selfie photo I snapped.

Last week, I gave my Apple Talk in the Bay Area to a business delegation from China. I began the talk with a group selfie. As I snapped a few pictures, the group got up from their seats and huddled in the center of the room so they would be in my photo.

The group selfie photo that an audience member posted.

A little after midnight, a woman who attended my talk posted some photos from my presentation (she's in the front row, next to my left ear). At first, I didn't think anything of it when I saw she posted one of my selfie pics. Then, when I looked closer, I noticed that the selfie pic she posted wasn't one of mine. After comparing all of my group selfie pics to her photo, I noticed that it was from a slightly different vantage point. This had me (and still has me) puzzled. When I snapped my photo, I was standing in front of the room, up against the whiteboard, and there was a desk between me and the audience. In other words, no one was in front of me or near me.

So, how or where did she get a similar group selfie photo? 

After looking closely at her photo, I noticed a black line, in the upper left of her photo, which I've concluded is the edge of my phone. It seems that the picture she posted was a photo taken of my phone's screen as I positioned my phone and preparing to take the group selfie. Clever.

This theory of mine seems to make sense, except I can't figure out where the camera was located in the audience (lots of audience members snapped photos throughout my presentation). If you take a selfie photo of someone when they're taking a photo of your phone's screen then you'd expect to see them in the selfie picture.

My best guess, without claiming any "my phone was hacked" conspiracy theories is that the camera, which took the photo of my phone's screen, was out of frame or blocked from view by another person, despite the fact that her photo looks to have been taken head-on. And that theory seems to make sense because the same woman, later at Apple Park, showed me some photos she took of my presentation and she made the point that her phone's camera software (not an iPhone) had the ability to remove the keystone effect when a photo is not taken perpendicular to the subject. Basically, her phone's software has the ability to remove distortion from photos taken at sharp angles.

I still want to know where the camera was located in the audience that snapped the photo of my phone screen. Hmm.

Update 24 May 2018: Hear ye, hear ye. It took a couple weeks, but the mystery has been solved. It turns out that the inexplicable selfie photo was taken by my translator. She was standing next to me, in the front of the room, as we began and she took a selfie at the same moment I did, except she was out-of-frame in her photo.