Aha! Yes, this is good info. I've been hearing rumors of these kind of dynamics. So, these days when I'm trolling a streamer and get a strike that doesn't hook itself, I quit paddling and pick up my rod and strip lightly, and then release the slack as my boat continues to glide slowly, and then repeat this a few times. If the fish comes back, I try to give it a little slack so the fly can get sucked in. Not too much slack though. Just enough to stop the forward movement of the fly, yet still feel a little tension on the line.