extremely ALERT

if you notice, some movies and tv shows like to say something like "DEFCON 1 or 2 or 3 or 4 or 5"

e.g: "give me the angry woman like DEFCON 2" -Bestfriend's Girl movie

"we must be alert like DEFCON 1" -Glee (Kurt Hummel) ➙ kalo ga salah ngomongnya gini hahha

and i'm curious about this thingy so i searched it in bing and I found this in wikipedia :)

DEFCON is an alert used by US armed forces

PS. lucu :D