An Orthodox man gets on the train and takes his seat.
After a while, he notices an Orthodox Cross on the man next to him.
After a while longer he asks, "Sir, I couldn't help noticing you're wearing an Orthodox Cross. Are you an Orthodox Christian?"
The passenger answers, "Yes, I am."
The man says, "Oh! I am too! Are you Greek or Russian Orthodox?"
"I'm Russian Orthodox." The man says,
"Ohhh, so am I! Are you Old Calendar Russian Orthodox or New Calendar Russian Orthodox?" "
I'm Old Calendar Russian Orthodox." The man says,
"Alleluia! I am too! Are you Old Calendar Anti-Ecumenist Russian Orthodox or Old Calendar Pro-Ecumenist Russian Orthodox?"
"I'm Old Calendar Anti-Ecumenist Russian Orthodox." The man says,
"Ooooh! Well, I am too! Are you Old Calendar Anti-Ecumenist New Ritualist Russian Orthodox, or Old Calendar Anti-Ecumenist Old Ritualist Russian Orthodox?"
"I'm Old Calendar Anti-Ecumenist New Ritualist Russian Orthodox." The man says,
"Well, glory to God! I am too! Are you Old Calendar Anti-Ecumenist New Ritualist Old-Man Trinity Icon-using Russian Orthodox, or Old Calendar Anti-Ecumenist New Ritualist non-Old-Man Trinity icon-using Russian Orthodox?"
"I'm Old Calendar Anti-Ecumenist New Ritualist Old-Man Trinity icon-using Russian Orthodox."
So the man says, "Aaaaaaa, you damned heretic! May you burn in hell forever!"