We bought a video camera with an amazing zoom function just before the summer convention one year. The kids were just entering their teens, and bored stiff at assemblies. So we spent the afternoon session one day zooming in on people on the other side of the stadium, and when we found someone from our congregation sleeping or picking their nose or *gasp!* not looking up the scriptures, we zooomed in and video taped them! 
I should look for that tape!
GGG