Rajska zahrada metro station. It was the first one that was designed to be pretty and not boring.
Those who have been to Prague most likely passed this church (walking or in a tram) near Malostranske square. The church itself isn't that much interesting.
And when you happen to forget your ticket, you pay fine. As is the blond girl in this case.
PS: To make this at least a little informative... here's a very helpful website of Prague Public Transport Company.