Well if they drag it backwards it can't breathe through it's gills properly, so they probably could have drowned it. If I were that guy, I would brag for the rest of my life about my fight with the shark.
well how are they going to drag the thing? put a rope around its tail then jump in the fishing boat? why didnt he just get in there in the first place and drive off? lol but yea me to
well, i believe the part where they "attempted to drown it" probably involved trying to get the rope on the tail and trying to get that rope to the boat...