Baitfish usually do that whenever we turn off the lights. I think last year we did that a few times to stimulate the fish into biting. Quacker, we were out near the main channel and never left a 50 yard radius. The water dropped from 35 to 50+ feet fairly quickly where we were at. I hope we can get a few more trips in before the fish start moving off. Two years ago we fished all the way to late July before the fish got really small, but last year we quit before the 4th of July. Catch them while you can!