The background from David Pogue on Pogue’s Proposal:
On August 15, 2012, I proposed to the love of my life. I made a fake movie trailer — a thinly veiled version of our love story. I persuaded the movie theater at a summer resort to play it before a movie we went to see. Both of our families were there to see it.
I hid a video camera to capture her reaction (it was in a ficus plant next to the screen). Here’s how it happened!
Be careful, something may get in your eye while watching this.
ht
If you go to the vimeo comments you’ll see how the reactions of the characters in the film were synchronised to an anticipated real life event.
mgpcpastor's blog 
Mate. That sets the bar pretty high for proposals!