I understand why Ellen Burstyn is in this movie
The makers of this crap-ass movie tried to make a buck by linking this to the greatest exorcism movie of all time. Putting her in it, and playing the original theme song at times was not enough to save this mess. Burstyn served no purpose in the movie, and double-jabbing her eyes out served no purpose in the story. The possession of the girls was boring and uninteresting.
Waste of time.