Plenty. Tridecaphobia, fear of the number 13, is one of the most common superstitions. Even horror writer Stephen King is said to get the shivers about that two-digit number -- one three. He's not alone. Fact is, airplanes usually don't have a 13th aisle and most tall buildings are missing a 13th floor.
All this is said to date back to biblical times when Jesus invited the 12 apostles to the Last Supper. Judas (the traitor) was presumably unlucky #13. Because the crucifixion happened on a Friday, the number 13, especially combined with Friday, is still considered unlucky. In fact, the British Medical Journal has noted traffic studies show more accidents occur on Friday the 13th than Friday the 6th.
However, others believe that you create your own bad luck -- or better luck -- on Friday the 13th. If you focus on things going wrong, you probably won't be disappointed. If you believe it's going to be a great day, you'll probably be right.
