This talks about the 4 corners of the US that mattered. San Francisco, Los Angeles, New York and Old Bridge. San Francisco was Exodus, Los Angels was Slayer, Metallica and Megadeth, New York was Anthrax, and Old Bridge was where Metallica moved to. A lot of people don’t believe that Exodus was part of the 4 horsemen, but if you weren’t there, it doesn’t matter, cause you wouldn’t understand.

—Dave Mustaine

The song would also be used to solve an interplanetary threat on Duck Dodgers.