I was reading a DNR fishing report, and it stated that people are catching crappie on, "jigs tipped with minnows under slip-bobbers." I've never fished a rig like this, and it sounds akward to fish. I mean, when I use a slip-bobber, (or any type of float) I'm primarily still fishing. If I use a jig, I'm using some type of swim bait, or actual jigging, in other words I'm constantly moving the bait-not still fishing. And, to combine the two-jig and float, seems to be opposite of each other. Please explain how this works or should be fished?