The art of airbrushing used to be a big thing. One of my first jobs was working for a guy who specialized in airbrush art, and he would do a ton of posters for the movie studios. The picture you see above is a piece of concept art for Steven Spielberg's classic film, Raiders of the Lost Ark. It was created in 1980 by Michael Lloyd using an airbrushing technique. Lloyd captured that horrifically awesome scene perfectly when he made it.
Thanks to Randar for the heads up!