On the fly it is all about the stalk. You have to see the fish to catch it, and in most cases you have to physically see them inhale the fly. They don't hold and artificial for more than a split second, and you won't feel the take except for the rarest of occasions.
So picture it...you spot a tail breaking the surface 200 feet away...a feeding carp. You sneak down the bank until you can see the fish. Head down rooting bugs and clams from the rocks, tail slashing the surface. The cast is good and the fly lands about eight inches away. As it sinks a big, white bucket mouth opens and vacuums the fly in, you rear back and set the hook!
http://www.youtube.com/watch?v=UpRwR8wEvm8&feature=youtube_gdata_player
The fish races out of the shallows, peeling 90 ft of fly line off your reel, and goes deep I to your backing on the first run. Eventually, you bring the fish in and slide it into the net.
That is when it goes right. Most of the time, it goes like this.
http://www.youtube.com/watch?v=AVtymk4DuG8&feature=youtube_gdata_player
But the best part is that all of that crazy drama can result in a fish that around here averages between 7-10 lbs. and they get a lot bigger than that!