when they shot the shark with the harpoon, and it exploded, that is a major slip up

first of all, when he poors the flares in the the little canister thing, he says "we should get about 1 1/2 sticks of dynamite out of these flares" that is a mistake, as a pro pyrotechnician, i can tell you that flares burn VERY slow and hot, dyno burns VERY fast, there is no way flare powder(magnesium) could explode, second of all when the other guy puts the end of the wire on the battery, and it goes off, it wouldnt go off because he is only useing one side of the battery, you need two seperate wires! there is no way that could ever happen!

they need a pyrotechnic consultant!