Although your open-water certification gives you the basics for safe scuba diving, it can’t teach you what it actually feels like once you’re on your own (with a buddy, of course). Scuba lessons will come one dive at a time, and you’ll probably learn things about yourself, and the underwater world, that you weren’t even expecting.  Here's what most divers figure out in their first 10 dives. 1. You will breathe too fast at first Excitement, novelty, and mild nerves...