I have to ask: how is that more effective than just sticking a minnow on the hook and waiting for a bass to bite it?
LOL
Do you fish?
Bass, Pike, etc, are all predators, and, predators look for prey constantly. They look for the weak or wounded, as, those are the easiest to catch/east likely to harm THEM, etc.
Lions pick the weakest looking of the herd of zebras, and muggers chose weak looking pedestrians, for the same reason...predators are hard wired to look for the most vulnerable victims.
It simply makes the predator select YOUR offering as preferable to the OTHER things swimming around in the vicinity.
I invented it back when I was a kid, and noticed that if I were catching sunnies, etc, and threw them back too slowly, if they were not doing well/flapping around floating on their sides, etc...the bass would smash them in mere moments.
I then "modified" the thrown back sunnies with hooks, and, well, never hurt for bass after that. injecting a little air to them made them unable to dive effectively, and their ATTEMPTS to dive attracted a lot of attention from whatever predator was down there.
That means cat fish, snapping turtles, birds of prey, snakes, and so forth, not just other fish.
LOL
I see NORM circled the lil guy.