I saw a video, or a movie (not sure what it was now) a long time ago where people were using TNT to fish. They would light the fuse throw the exsplosive, and bang! A bunch of fish would float to the top of the water. The people then just scooped up the fish.
Not very sporting. But if you are hungry, who cares about sports.
. I would love to freeze a half years supply of walleye! YUMMY!