When you are working in areas where there is a lot demonic activities, the presence of God that you carry into those places expose their presence. They usually manifest in different ways. In some cases they scream out aloud and when you are conducting a Christian meeting they draw so much attention that can easily be a disturbance to the meeting. You need to know how to discern what is going on in a meeting.
When people are being prayed for in a meeting you have to realize that it is not every fall to the floor that signifies the power of God. When someone screams with eyes rolled backward and fall violently it shows that the person is overtaken by another entity. This means that you have to exercise the authority of the name of Jesus to cast out that entity. In most cases when the victims come back to their senses they usually do not know what happened to them. This shows that the entity is most likely a demon and the power of God just exposed it. When this happens, cast it out in the name of Jesus.
Some of these spirits are familiar spirits and familiar spirit can fascinate the unsuspecting by the way they reveal other people’s life secrets. This can be sometimes mistaken for the “word of knowledge”. Get to discern what is behind the manifestation and you will know if God is it. In 1 John 4:1-3 the Bible says, “Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world. Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God: And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world” (KJV).