Fr. Siarhei Hardun, an Orthodox Priest from Belarus, speaks the Gospel and shares the Apostolic Faith with Presbyterians in their own house. This is real Orthodox ecumenism at its finest.
Check out the insightful article on Fr. Siarhei's bombs at GetReligion.
And this especially insightful comment quoted by Fr. Joseph Huneycutt at OrthoDixie:
It’s worth noticing that the most usual Orthodox presence encouraged at such events is the more “colorful” Orthodox; the ones who have an interesting accent, hair, beards and such. Inviting the Orthodox from around the corner is likely to get you a *former* Presbyterian, Episcopalian or what have you. No accent, possibly the same hair. Not as interesting or exotic as the above (very good) priest. He was certainly expected to provide decoration and gratitude but surprised people by talking about God. That was an unplanned aberration.