Stuck for what to bring to that July 4th cookout? Well, contemporary artist Dimitri Tsykalov, a Moscow-born Parisian, has a cool short film demonstrating how to carve a watermelon skull just like this one. (He also works in apples, cabbages, eggplants . . .) But if you’re looking for a sinister main dish to pass, well, the piece he calls Colt 45 is just one choice from his enormous series devoted to meat. Fire up the grill!