That reminds me about a situation wich happened this summer to me when I was returning from Ukraine by car. I was asked by a Russian customs officer who happened to be a very beautiful young girl where I am going too. I was in the mood for a jokingly flirt (I just left my wife and kids at Ukraine at my mother-in-law's then, hehe) and I answered in macho voice: "I'm going home". I almost added something like "baby" or so but held myself at the very last moment. Her reaction was unexpected: she hided my papers wich she was checking, made a stone-face and said: "go for a walk for a while and next time think twice how to talk to a customs officer who is doing her job." I must add that I had stood in a line for about a half of an hour to get to her desk. So I had to stand in that line again. After I came to her desk for a second time she gave me a look like he saw me for the first time and asked again were I am going. I told her my adress and she returned my papers to me like nothing happened. Actually after losing more than a hour just at Russian customs (when you are crossing Russian/Ukraine border by car you have to pass 6 checks: customs check, border guard's check and passport check at one side and the same checks at the other side) I was considering here not so beatiful as it seemed to me before, to say the truth I was calling her "bitch" in my thoughts by then.
Ha-ha, good luck doesn't seem to be your cup of tea. But I'd never go like that anyway, I'd simply say if I were you then, "I'm going from Ukraine to Russia", and nothing but a legal law could make me clarify more.