Fatto matematico: 8178 is the number of ways 13 people can line up so that only one person has a taller person in front of him.
Trivia: 8178 is an unremarkable number.
Data storica: May 22nd is the day in 1915 that Lassen Peak erupts with a powerful force, and is the only mountain other than Mount St. Helens to erupt in the continental US during the 20th century.