A promotional message from the crowds department

So you said you have to direct a  movie in which two hundred and fifty martians have to suddenly wake up and dance the Harlem Shake right ?
And you're wondering if you'll be able not only to find and hire that many extra terrestrials, but also if they'll be inclined to learn that ridiculous dance move instead of, let's say, annihilating the planet ?
Fortunately the crowds department is here to help you !
Using some computer graphics magic tricks, "they'" (the crowds department) will happily create hundred of martians of many different shapes (slim, fat, tall, short, with three eyes and pointy ears etc ...),  colors (green, dark green, light green, semi light green and ... ok you got it) and will make them dance the Harlem Shake or other dance moves !
The crowds department is here to help you.

The crowds department is here to help you !