Fr. John did a trick during his homily that I've seen him do before at a retreat, but it is awesome everytime.
It was Pentecost Sunday, which celebrates the "birth" of the Church and the descent of the Holy Spirit. He said, "In five minutes, I will teach you a four part chant, in a foreign language." Latin, of course. He assigned each section of the congregation one of the parts, then started us off. Each section chanted "Veni Sancte Spiritus" in a slightly different melody/note. It was awesome when everyone in the church was chanting, the entire congregation seemed completely united in "lifting up our hearts" to the Lord in prayer. Then Fr. began to sing "Come Holy Spirit" over the top of the chanting, and ended in a prayer (with the congregation still chanting). It was amazing!
The songs for the rest of the mass seemed cheesy and weak by comparison.