I think (don't quote me) but he said that he wanted to go to Russia to pick up his paycheck.
He didn't want to enter Russia on a U.S. passport to possibly get labeled as a spy from the U.S.
OR if he were to get charged with cyber bullying, racist remarks or such he might have to flee the U.S. in a hurry for a safe haven like a rabbit returning to its hole when in pursuit by danger.
OR maybe he is really posting from Poland and just fooling us and plans on coming to live in the U.S.
OR he was just yanking your chain to get a rise out of you which is my guess do to the fact the U.S. Embassy does not call you on the telephone to pick up your passport, they notify you by mail.
Lets ask HIM and see what he has to say to help answer your questions.
Oh I see he already did, please disregard.