You will need a butcher's knife to crack the coconut. Notice the coconut has a seam in between the two "eyes" of the coconut. Hold it over a bowl with the seam running lengthwise along your palm. One tip should be facing you, and the other should face away from you. Take the knife in and strike the center of the coconut several times, while turning the coconut in your hand. It coconut will crack open neatly. If you follow the steps in this video, you should be able to crack a coconut easily.