Traditional Pentecostal teaching about Baptism in the Holy Spirit
http://www.godtube.com/watch/?v=DPZGPWNX
http://www.godtube.com/watch/?v=JCB9JJNU
Baptism in the Holy Spirit is viewed as a post conversion event by many Pentecostal Christians.
Tongues are considered to be THE SIGN of Baptism in the Holy Spirit.
Baptism in the Spirit is considered to be an optional extra by these precious brothers and sisters.
Pentecostal believers usually believe that the disciples received the Holy Spirit when Jesus Breathed on them on the day he rose from the dead (ie before Pentecost). Then they were Baptized in the Holy Spirit at Pentecost. The initial receiving was a deposit and the baptism is a full filling.
Alternative Pentecostal Teaching
An alternative interpretation is that the disciples were commanded to take the Holy Spirit with them when they went into the Nations to preach the Gospel, when Jesus appeared to them on the day of the resurrection (John 20:22). The disciples were already regenerate as a result of circumcision by the Spirit. They then were filled or Baptized with the Spirit at Pentecost. Now when the Gospel is preached to Gentiles, Baptism in the Spirit and Regeneration occur simultaneously at conversion. Only for faithful Jews in Jesus’s time was it possible to be regenerated before being Baptized in the Spirit. The Holy Spirit was given as a foretaste or deposit of what we will experience in Heaven or Eternity. Tongues are A SIGN of Baptism in the Spirit but so are the other Gifts of the Spirit, the Fruit of the Spirit, praising God and confessing that Jesus is Lord.
http://truthinlove.com/References/BIBLE.html