pentecostal

I have seen televangelists on tv and I have visited churches which are pentecostal and they preach if you give tithe, you will be blessed and the positive confession, where the people declare in the name of Jesus they are healed and or stuff like that, those people say they just prayed in the...

Do they all have to speak in tongues?

Has any one ever heard of the 80 pentecostal heads of christ if so can some one explain what its about? Thanks

I just have a quick question i am new to the whole pentecostal/assembly of God religion and beliefs and was wondering what exactly it means when someone..."passes out"/ "falls out" at the altar?