Go to any sizable wiki page and click the first wiki link, then repeat. The theory goes that eventually you will end up at Philosophy. For example Eddie Vedder took seven clicks to reach Philosophy.
It's not a law, however. "Township High School District 211" sent me into an infinite loop:
United States
Contiguous United States
Alaska
U.S. State
United States
Perhaps I should edit one of the pages to prevent that...?