Carbon Costume 
Regan from The Exorcist
In The Exorcist, Regan (Linda Blair) is a young girl possessed by the demon Pazuzu and requires an exorcism to free her. Although you may be able to recreate Regan’s demonic look, it isn’t quite the same without the head spinning and projectile vomiting. Rumor has it that in the movie, split pea soup was used for the green-colored vomit.
