I heard people use trains a lot in England. Here's a free tip

In a Madrid train station, there were two Jews in the line to buy tickets to Paris. A few people
behind were two Turkish guys quietly watching the Jews, always wanting to play tricks on
them. When the moment came, the Jews bought only one ticket but, to the astonishment of the
Turks, the two of them got on the train.
As it was a non-stop trip, at a certain moment a conductor came into the car and started clipping
the passengers' tickets. The Turks, watching the Jews, started to giggle, certain that the Jews
would be caught. But, to the Turks' amazement, before the conductor could see, the Jews ran
and both went into a single lavatory.
Used to having people in the toilets, the conductor knocked on the door: "Paris, Paris, ticket,
please!" Immediately, the Jews slipped the only ticket they had under the door for the man to
clip it. The Turks were astounded by the trick (and mad, because they had spent money
unnecessarily).
After a few days, Turks could be seen in the line to purchase tickets back to Madrid. The Jews
came a bit later. Of course, the Turks bought only one ticket. What surprised them was that
when the Jews saw it, they left the line without tickets.
Again came the moment when the conductor stepped into the car. The two Turks went for the
toilet right away, the same way the Jews had done before. The Jews sat patiently until the
Turks were in the lavatory. Then, in a flash, they went to the toilet and knocked on the Turks'
door. The Turks immediately slipped the ticket underneath the door. The Jews grabbed it and
dashed into the next lavatory.... .