I used to dive. I was an instructor. I got certified in Cozumel. I moved to Florida to be able to participate more fully on a cave diving exploration team, WKPP. I became suspicious that I had a PFO, a hole in my heart that would allow bubbles to cross over without being filtered out by my lungs, and I was right. I arranged to go up to NY for robot surgery to fix it. In the course of the final imaging, it was discovered that I also had three large AVMs in my lung. So even if my heart was repaired, my lung would still allow bubbles through these large vessels that change from artery to vein without capillaries. No doctor would even discuss a repair of that with me, although I know it can be done. They suggested I get another "hobby." My investment in diving is about $30k of equipment which is now just sitting there. I went cave diving one more time since my diagnosis, because I figure I'm pretty safe at depths up to about 110 feet, but my heart just wasn't in it any more. Exploration cave diving was my life, and to not be able to do the dives I'd been doing was like a death sentence. So...I'm lucky I have snake friends down here now. All my first friends in Florida were diving friends and it was just too painful to hear about it. Mostly I have drifted away from them.