Or is it just a false charismatic pentecostal phenomenon?
Yes, that is my understanding of it.
Sorry to be blunt, but it is charismatic hoo-haa.
I have seen that simple obedience to the word of God is the hardest act of compliance that any person or church can fulfill.
Recently, our Pastor Jock (Spirit-filled since the early 1950s) gave a powerpoint presentation on the history of Pentecostalism over the
last 100+ years (1880s > 1901 the Holiness/Temperance Movement & Divine Healing: 1901 > 1920s first "Pentecost" churches & great Revivals: and
going on decade by decade through to present day).
The history of Pentecost is not constant nor stable. Most churches and ministries start of with great enthusiasm with believing Mark 16: 15-20 and the Book of
Acts. But invariably personalities and the desire for personal "spiritual" experiences corrupt the discipline of simply doing it by the word of God.
Submitting to the doctrinal teachings of the epistles by the apostles [setting out the rules and doctrines for the proper conduct of the Spirit-filled Church]
gets replaced by charismatic teachings and doctrines inspired by pastors who believe in their own thoughts and egos.
I have seen YouTube videos showing congregations dancing and cavorting in the aisles. I have seen the word of God replaced by praise and worship music,
and by emotional outbursts. People fainting. People bursting out in song, or rolling on the floor. This is not in line with the Scriptures.
The Word of God is straightforward and describes unambiguously the process for being born again by water and the Spirit.
Repentance - coming back to God, understanding the need for salvation in Jesus...
Water baptism by full immersion [at an age of understanding, not infants] this is a Biblical commandment.
The New Testament from the gospels to Jude clearly command water baptism for the forgiveness of sins. Confessing one's faith in the gospel.
Seeking to receive the Comforter, seeking to be infilled by the Holy Ghost - to be baptized in the Holy Ghost with the ONLY Bible evidence given:
speaking in other tongues [as Jesus himself declared].
The epistles bring teaching and sensible guidelines to the Churches of the 1st century. Given that Pentecostalism was a totally new experience and quite
different from the rigorous legalistic constraints of 1st century Judaism. Christians became FREE from legalistic religion and the burden of hundreds of
laws governing everything in their lives. Unfortunately, this liberty given by the New Testament Covenant has proved to be a source of doctrinal confusion
and hoo-haa in "Pentecostalism." Strict obedience to the word versus the freedom to experiment with the spiritual.
When the church at Corinthians got out of order and began to descend into a circus of competing charismatic experiences and sinful excessives, Paul
wrote to them twice and brought about correction and proper conduct. All the epistles are written to give instructions unto right behaviour and understanding
as to what being made free and set at liberty by the Spirit is all about. Temperance, being sober, overcoming the flesh...
In the Revival Fellowship we have a practice at our meetings of inviting up members to give their testimonies in how they came to receive the gospel and to
be born again. Everybody gives testimony to their water baptism and to receiving the Holy Spirit with the Bible evidence of speaking in other tongues.
Then usually immediate healings from whatever troubled them at the time (some have longer lists than others).
But it is always about learning to grow in obedience to the word of God [the Scriptures] and in growing in the righteousness of the the Lord through the work of the
Holy Spirit. We talk in our testimonies of "walking in the Spirit" and in "walking with the Lord."
As for being slain, that only applies to the old previous person who was buried in the waters of baptism.
Galatians 3:3 Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?
Titus 2:11 For the grace of God that brings salvation hath appeared to all men,
Tit 2:12 Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
Tit 2:13 Looking for that blessed hope, and the glorious appearing of the great God and our Saviour Jesus Christ;
Tit 2:14 Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.