I haven't seen it, but just recognizing that Jesus Christ can get pretty darn tough when He wants to is great in my book!
I think the movie reference illustrates a great point how Christians can become easily confused about casting out demons. Any believer can do it. There is no secret formula.
We are commanded to...
Matt 10:8 “Heal the sick, raise the dead, cleanse those who have leprosy, drive out demons. Freely you have received, freely give.”