Looks pretty cool apart from that bit where your lungs explode ed:[/quote:8095d]
I wouldn't mind trying it somewhere in a tropical island, and checking out the coral reef and crap that would be cool. I'm always afraid of the sharks though. cry:
my advice is for you to put on a mask (so you don't get water up the nose), take a deep breath and take a few strokes UNDER the water (preferrably breaststroke). You will soon feel what kind of movements make you go up, and after that it's easy.