This is a wonderful healing ministry of Jesus that any of us can do with a little training and practice. Billions of people need this. You could help them! No doctor or scientist could do what a Christian can do to deliver people from demons that make them miserable. What a privilege to imitate Jesus in this ministry of His! The sermon slides are below.
Also, here are some really good video's the Lord led me to on YouTube where a guy confronts demons in people on the street while preaching. He delivers one guy on camera ( The guy spits up a little. sometimes happens when a demon comes out--not too gross).
I recommend you watch these to get a quick overview of what happens when demons feel threatened and when we shine the light of jesus on them to set people free.
http://youtu.be/ypfWD7JaGf0 Here the guy gets delivered on camera
https://www.youtube.com/watch?v=iN9-zvDLO1E Here an obviously demonized man threatens the preacher. Demons only do that when they are really scared of us.
https://www.youtube.com/watch?v=yMB9Sl3KfvU ( demon speaks through a man to confront the preacher)