Theatrics is one thing (amazing what some producers want to see - remember the diver on the scooter who was told to flutter kick as it didn't look real enough if he did nothing)
But why do you say that they were not DIR Jason? Hard to tell I thought - apart from the blue fins that is.... definately not
Lights were being held in both hands to aid in lighting up the cave for the video (noted on the basis that some were pointing backwards) and we don't just use frog kick you know.... as you will find out on your fundies course.
In fact the group who helped the BBC in this were the
Group of Exploration of Ox Bel Har - you will find a few familiar names in there
54 days and counting til I get to go.... yay!