I had a day last year where I would catch one fish vertical jigging a stump however, if I backed away about 10 feet and underhand pitched the jig and let it pendulum swing the fish would nail it. Who knows if they were hitting it because they were mad at it or if they were chasing it away, but they simply wanted it moving. Sure wish I had a camera to look underwater and see what they are doing. Might be a classic case of "the fish are not biting because they are not there"!
I have OCD "Obsessive Crappie Disorder"