Or Demon Possession? One would be wrong to automatically assume that altered brain activity is a sign of angel involvement or God.
The “Speaking in tongues” in Acts 2 by the Apostles of Jesus is VERY DIFFERENT from the babbling in tongues I hear from many churches today.
The apostles spoke in a KNOWN EARTHLY language they never learned before. For instance, if I don’t know Urdu, and I can suddenly speak it, THAT is the kind of miracle that was manifested in Acts 2.
What those who “speak in tongues” today tell me is that they are speaking in some unknown “heavenly” language.