Once Santa is traveling by train. On his way, he feels the urge to go to the bathroom. So he goes and opens the bathroom door, which happens to have a mirror in the front. The Santa thinks there is someone in there, quickly shuts the door and returns to his seat.
5 minutes later he goes again, only to find the same person there. An hour passes away, he has made 20 trips to the bathroom, only to find that the same person is still there.
So he finally gets ticked off, goes to the last compartment and tells the TC (Ticket Checker) what's been going on. The TC feels bad for him and promises to throw the bum out. The TC walks down to the compartment with the troubled bathroom to get the resident person out.
Few minutes later the TC comes back and tell Santa, "I m sorry, I can not do anything. The guy in there is a railway staff member."