I used what I called a 'skip', or 'bounce' cast to get at fish rising back under over hanging limbs. Something I worked out for my self, based on the old habit of 'skipping' rocks across a pond or stream surface. A few years later I read an article in one of the major fly fishing magazines about some guy who had come up with a new cast to get bugs back under the over hangs without having to go upstream to an open spot, and cast the fly to the far bank and let it float down, as was advocated at the time for this situation. The cast description was for what I had been doing for about three years!