Behind the Screen (1916)

Three movies are being shot simultaneously and Charlie is an overworked scene shifter. The foreman is waited on hand and foot until all the shifters but Charlie go on strike. A girl looking for work pretends to be a man and helps Charlie. Charlie discovers her gender and falls in love with her. The foreman thinks they are homosexual and in the ensuing fight they become involved in a long pie throwing scene from one of the movies in production. The frustrated workers dynamite the studio.