Damselfish:Also, if the tank is bungied in the holder, remove the bungie before putting your reg on the tank, else you will wind up with the boat bungied to your back and it's hard to dive that way. I've heard this called the "Bungie Diver" specialty.(And hook the bungie back around the reg after it's set up so it doesn't crash on your feet!)
Oh yes, I've bungied myself before. I prefer the bungies because you can tip the tank towards you so you don't crush your fingers trying to get the bc on the tank. Some of the boat briefings I've heard were hilarious - particularly in the Keys. "Every once in a while pop up and take a bead on the boat .... and this boat is named .... if you get on the wrong boat by mistake .... try not to get down current of the boat ... wave one of your fins and we'll eventually get to you..."
The most difficult part of boat diving is getting back on the boat in a moderate or high sea. In my limited experience, the only diving accidents I've seen are people getting pitched back off the ladder, getting smacked in the face with the ladder, and being hit by someone falling off the ladder. The ladder itself might make for a course, or at least a seminar.