Spooked Trout

You are fishing dry flies up a beautiful brooke trout stream and you spot a brook trout rising regularly to take naturals from the surface 20 feet upstream. You know your fly matches the naturals so you false cast to measure the exact location of the brook trout and then you cast your fly on the correct current which takes it right over him. To your amazement he doesn’t take your fly. In fact, he stops rising to take the naturals. What’s wrong? You spooked him when you false cast over him. The next time make your measuring cast well to the side of the trout’s feeding station where they cannot see it….