Light your grill to a medium-high heat

Use a pair of scissors to cut along the back of the lobster tail (the side without the little spikes), stopping at the end of the tail before the little tail wings start.

Mix the melted butter together with the garlic, lemon juice, salt, and pepper and pour it over the lobster tails.

Put the tails on the grill and cook on each side for about 5 minutes, or until all the flesh has turned white and the shell has turned bright red. You really don't want to over cook your lobster and dry it out. When the lobster is cooked, place the tails back into the butter and serve with all of the extra butter.