Get to the correct station. Buy a cheap Russian pocket watch with the last of my rubbles. Wait for the train, and worry about what the Russian border guards are going to do about my expired visa. Catch the train. The guards come to visit me because they're not very happy with me expired visa.
Nobody seems to know what to do, and the train gets held up while the chief is sent for.
I get the money, give it to the guard, get a reciept, and get back on the train. Whew, could have been much worse, the conducter tells me that usually I wouldn't have been allowed to leave and would have been sent back to St Petersburg.