I had a professor once that said the only dumb question is one you don't ask. Well, I am going to ask and show my ignorance yet again. On a roll cast, I know you are suppose to do it on water so that you can properly load the rod. But suppose you are on a creek bank, behind you is a jungle of brush, trees, and weeds. No possible way to make a back cast. The biggest trout you have ever seen is on the opposite bank, head out of the water and mouth open, begging you to put a fly in there. The only option is to roll cast. If you are suppose to have the line already in the water, to properly roll cast, how do you get it out there to start with? How much line do you need already in the water for it to work? As always any help is greatly appreciated.

One other thing I am starting to wonder, do any of you pack dynamite in your fly boxes? I don't think it would be very sporting, but I bet it would be a blast