Acts 2:1-24
The entire point of Pentecost, the outpouring of the Holy Spirit, and the power given to the disciples is not just some freak show act from the circus. Rather this is an event with great significance for the preaching of the gospel. The foreigners in Jerusalem that day were flabbergasted because: "in our own languages we hear them speaking about God's deeds of power." (Acts 2:11)