Holy cow, I wrote a book!
When a theater or concert performance begins,
there is often an announcement asking audience members to
silence their cell phones and similar devices.
Some time ago,
a light blinked near the ear of a gentleman a few rows in front of me
throughout the entire performance.
I couldn't tell what it was for sure, but it appeared to be
the indicator light of a Bluetooth headset.
Five seconds later:
Repeat for two hours.
What I want to know is, was this guy expecting a call
during the show?
If his phone rang, would he answer it from his seat?
This was before Bluetooth headsets were in common use.
It wasn't until after the show that I was able to guess what it was.)