I was about 15. I was out fishing a couple times when a hatch came off, and the fishing with bait or lures would come to a halt. My dad and an 8wt rod that weighed about as much my arm and an old automatic reel that I think he used once or twice. The only flies he had were poppers, and I had no idea what I was doing, but I waded out and flailed around. Somehow, I got into it, started catching sunnies and got into the magazines, books, and videos to learn. I'm largely self-taught, and the influence of that uncertified teacher still shows up in my casting form now and again, but otherwise it's worked out well.