Speaking of not possible

The Dutch are pretty relaxed in a lot of ways. While in Amsterdam, we took the tram several times. They sell tickets on board from a little booth where the conductor sits. If you're getting on with a pass or a transfer, you show it to him or her, and if you need a ticket, they tear a little paper one out of a booklet and validate it right there. One time we got on, and the conductor told us he was out of tickets. But it was okay: we could ride for free. If that had happened in Belgium, the conductor might just as easily have told us we couldn't ride because there were no tickets.