FRIDAY 13TH; WALKING UNDER A LADDER ON FRIDAY 13TH; SEEING A BLACK CAT WHILE WALKING UNDER A LADDER ON FRIDAY 13TH; BREAKING A MIRROR WHILE SEEING A BLACK CAT WHILE WALKING UNDER A LADDER ON FRIDAY 13TH; NOT SALUTING A MAGPIE AFTER BREAKING A MIRROR WHILE SEEING A BLACK CAT WHILE WALKING UNDER A LADDER ON FRIDAY 13TH; ALL THE ABOVE PLUS EVERY OTHER FORM OF BAD LUCK