Whenever I see this discussion, I remember my younger sister telling me about her being "slain in the spirit" in a local Pentacostal church, and a pastor well known for his Pentacostal activity.
The thing is, my sister never was a Christian. She went there with my other sister, and to this day is not reborn, I'm so very sad to say!
So what happened that day?
What happens to any other sinner whereby engaging a phenomenon by being at that place.
Matthew 24:23 Then if any man shall say unto you, Lo, here is Christ, or there; believe it not. 24 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect. 25 Behold, I have told you before. 26 Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not.
I remember a church I had visited locally one time, had the pastor going around the room making sure everybody was a believer before they put the spotlight on the Holy Spirit in worship. Could it be that some were speaking in tongues with the church but were discovered later they were not believers? Can't say for sure, but it would not surprise me since that kind of tongues of gibberish nonsense was in the world before Pentecost cane with God's gift of tongues which is really a foreign language to speak unto foreign people in their native tongue ( 1 Corinthians 14:20-21 ).
That is why believers are not to believe every spirit but test them because spirits do fall on sinners dramatically in other religions, the occults, and cults in Christianity.
Think about the One World Church that is coming during the great tribulation. Nobody can see how that can happen to bring all religions together, BUT if they all spoke in tongues that is just gibberish nonsense and they can all fall down or laugh uncontrollably by a phenomenon, that would unite them all as one, would it not? And yet we are called to come out of the world and away from those spirits and all appearances of evil to the Son for life and for continuing that reconciled relationship with God thru Jesus Christ, the Bridegroom.
So really. saved believers can be seen as committing spiritual fornication by going after these spirits thinking they are the Holy Spirit for a sign when they should be resting in Christ Jesus, in waiting for the Bridegroom. Makes me apply the foolish virgins parable to saved believers out to the market place seeking to be filled with the Spirit when those that are ready to go know they have been Spirit-filled since they were saved.