Exorcist II: The Heretic
A still picture from this film was taken from the 1976 teaser trailer for Exorcist II: The Heretic. (The picture of a girl laying on a bed, which would represent Linda Blair in the first film, was taken from this film)
Here's the link: http://youtube.com/watch?v=ZGaxpRvytSI
Gumby is da old-skool king!