For years I've been doing some of the Liturgy of the Hours in Latin--those hours we don't pray in common, and since I've been a priest I've learned some of the quiet prayers of the Mass, but I have never prayed out loud in Latin at a public liturgy.
Today was the first time. It was "mission appeal" Sunday, and our mission preacher was a priest from the archdiocese of Kampala in Uganda. Of course this was also exciting for me on a personal level, given my devotion to St. Charles Lwanga. When it was Father's turn to preside at Mass, I concelebrated so that he wouldn't have to worry about the particularities of our procedures. Concluding the Eucharistic Prayer, Father intoned the doxology in Latin. I managed to overcome my happy surprise and join in around the est tibi.
Per ipsum et cum ipso et in ipso est tibi, Deo Patri omnipotente, in unitate Spiritus Sancti, omnis honor et gloria, per omnia saecula saeculorum.