@scanmead:...  You are right...  And there are smaller communication devices that are virtually invisible.. not to mention in a time long ahead of us in a time where time travel is a technological reality, the communication devices will be even smarter..

One point:  this short clip is a small magnified part of a wider angle shot outside the theater as a " back drop shot"  included in the movie story.. 

the people caught in it did not know there was a camera capturing the area...  So our mystery person would not have known about it in order to avoid it...

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