4 student pilots are at a train station, and buy 4 tickets for their trip.
While they are waiting for the train, 4 commercial pilots turn up, but only one of them buys a ticket. The 4 pilots then wait for the train with the students.
One of the students asks, "How are you going to all travel with just the one ticket?", to which one of the pilots replies, "Watch."
The train duly arrives, and the students all sit in the carriage. The pilots, however, all pile into the toilet cubicle and lock the door.
The train pulls away, and the ticket inspector comes around. Seeing the ENGAGED sign on the toilet, he knocks and calls out "Tickets, please."
The toilet door opens an inch, and a ticket gets handed out. Once it's stamped, it gets handed back through.
The students are mightily impressed . . . .
Next week at the station, the 4 students turn up, and only one of them buys a ticket.
The pilots turn up just afterwards, but don't buy any tickets.
One of the students says, "Surely you're not going to get by without buying a single ticket?", to which the a pilot respons, "Watch."
The train arrives, and the students all pile into one of the toilets, while the pilots pile into another.
As the train starts moving, one of the pilots pops out of the cubicle, walks up to the one the students are hiding in, knocks on the door and calls out "Tickets, please." . . . . .