Hekatohendecaphobia

Hekatohendecaphobia (from Greek hekato, "one hundred", and hendeka, "eleven") is the fear of number 111. The unluckiness of the number began with naval admiral Horatio Nelson. The number 111 is believed to represent three missing body parts of Nelson — his eye, arm, and leg. Others say it represents Nelson’s three great naval victories in Copenhagen, the Nile, and Trafalgar, while still others simply say 111 is considered unlucky because it resembles an empty wicket.

In other areas, the number 111 is considered unlucky in cricket. If a team scores 111 points, everyone but the batsman should raise one leg, otherwise the team will lose the next ball. Raising one leg while standing on only leg would risk falling down and getting hurt.