Triskaidekaphobia? It means what?

In the spirit of Halloween

It means many cities in the U.S. have a 12th Street and 12th Avenue, but no 13th Street or Avenue. In 80% of tall buildings in the U.S. it means you go from floor 12 to floor 14 without stopping. Hospitals and hotels often have no rooms numbered 13.

Irrational or obsessive fear of the number 13 is not confined to a single country or area, but seems to be spread internationally. Embracers of the phobia point with self-congratulatory justification at the Apollo 13 disaster, and the 13 letters in the names of Jack the Ripper, Charles Manson, Jeffrey Dahmer and Theodore Bundy.