Bad luck to open an umbrella inside, bad luck when a black cat crosses your path, bad luck to walk under an open ladder, bad luck for the groom to see the bride before the wedding in her dress, too many cooks in the kitchen means a baby will fall ill by sunset, finding a penny heads-up is good luck, if you spill the salt you must toss some over your right shoulder to prevent bad luck, if you break a mirror it is seven years bad luck, killing a spider is bad luck, people die in groups of threes, finding a four-leaf clover is good luck, if you sweep (with a broom) under someone's feet then they will never get married, stepping on a crack will break your mother's back, and that blood in your body is blue until it comes out. If 13 people sit down at a table to eat, one of them will die before the year is over.