It’s called the “Harlem Shake.”
For the uninitiated, it consists of
users uploading videos to YouTube that last about thirty seconds in
length and feature the opening of electronic music producer Baauer’s
song “Harlem Shake.” The videos begin with the song’s sample of a man
giving a shrieking siren call of “Con los terroristas!”—Columbian
Spanish for “with the terrorists”—followed by one person, usually in a
ridiculous mask or helmet, dancing to the song alone as the beat builds.
He or she is surrounded by others who are stationary, blissfully
unaware of the dancer. When the directive, Then do the Harlem shake
is uttered about 15 seconds in, the bass drops and the video
metastasizes into pure chaos—the entire coterie engaging in paroxysms of
dance for the next 15 seconds in outrageous outfits, and wielding
bizarre props.