Well, I framed the talk with a narrative of my Blue Abyss dive in MX. When I showed pictures of the stairs getting down to the water, I had one of the smaller women in the audience come up and get into my doubles and walk around in them a little, to show it could be done, and then I showed some differences about how the gear's set up and talked about streamlining and how nasty line is.
Then I showed some pictures going into the cave, talked about the five safety rules, and had somebody come up and run guideline on some chairs and then follow it blind.
More pictures, and a slide on hazards of cave diving, and I talked about redundancy and lights, showed how my can light worked, and then talked about silt and had somebody lie down and practice frog kicking.
Then I showed
THIS video of the passage we dove (which isn't a video of us, but it's the same part of the cave). Throughout, I was showing some of Nick Ambrose's
pictures (of which I have more than what he has on that site) which he shot during our dive.
Then I talked about training sequences, and about doing cenote tours if you're intrigued but unsure. And then I showed the slide of me, looking totally drugged out with absolute amazement and delight at the Blue Abyss.
It went pretty well, although the audience didn't get into the interactive parts as much as I'd hoped.