I’m always bangin on about the first cast being the most important, which it is. The brown trout or Salmon hasn’t seen anything that day hopefully,and you come along with an atractive lure or fly and they react. Bang your into a fish.

If the fish has time to see it or is suspicious the first time chances are he won’t go for it on the second or third time,only thing you can do is move on to a fresh new cast or change the fly.