I'd have to agree with most of what was said in previous posts here...
I think if you had hallucinations or other delusions while in the group, and then they stopped afterwards, it's more likely that you were having experiences due to stress and mental suggestion, rather than a mental illness.
I also think that Pentecostal churches attract those who are schizophrenic. Also, I think that they make pre-existing psychotic disorders worse because they encourage individuals to believe that evil demons are possessing or influencing them... or that they can magically speak in foreign languages... etc. I think the whole psycho-circus atmosphere would stimulate anyone who is mentally sensitive to have outbreaks of illness.
Pentecostals have their own personal view of the Bible and their own personal dogma, like any other fundamentalist group... Personally, I do think they are a cult and I do think they are dangerous to the mental, physical, and spiritual health of their parishioners.
Innapropriate Hugging & The Public Psyco-Circus
In regards to the comment about the friend who was accused of inappropriately hugging ... I wouldn't doubt it. My experiences with Pentecostals is that they tend to be very touchy-feely people and they really get into close contact hugging. (eww)
When I was 17, I had a friend who was Pentecostal and after much coaxing, I finally agreed to attend a service with her. I had been raised a Roman Catholic and had since become an atheist, so, what I experienced and saw at that church was really shocking! (and I must say I was personally offended by some of the readings, but, that is another matter, all together...)
There was a lot of hugging happening before the service. When my friend and I arrived, there was a small mob of older men standing just inside the church entrance who greated everyone with warm and "snuggly" hugs... I found this really disturbing and uncomfortable. After enduring 2 hugs, I made sure to back away, and insisted on a handshake, instead. They all looked at me like I was a weirdo, no doubt wondering if I had demons in my head.
Shouting, jumping, shaking, and screaming... it was more like a mental ward without nurses than a church with parishioners! The part where the priest slammed his palm onto peoples foreheads, smacking the demons out of them, was especially bizarre to me. (Go to church to find peace, get smacked in the face and fall on the ground... that's just all wrong!)
My adivce to anyone who is interested in visiting a Pentecostal church: stay home
Kindness and Compassion are the building blocks for a life of Peace and Happiness.