Residents of Copenhagen who visited the square in front of the town hall were greeted by a strange sight. One of the subway cars from the city's new subway, which was under construction, appeared to have burst up through the pavement. The subway car actually was a retired vehicle from the Stockholm subway. It had been cut at an angle and loose bricks were placed around it, to give the illusion that it had crashed up from below.
The stunt was sponsored by Gevalia Coffee, whose advertisements had an ongoing theme of vehicles popping up in strange locations, with the tagline "Be ready for unexpected guests."
The Danish Government issued a demand that the British government make its motorists drive on the right side of the road, instead of the left. The Danish Prime Minister Poul Schluter held a press conference at which he said, "We see this as a very serious case and intend to raise the issue in the (European Economic) Community… It is one of our priorities." Schluter, known as an enthusiastic cyclist, remarked that he was afraid to ride his bicycle in Britain. As he was leaving the press conference he turned and added, "April Fools."
, a Copenhagen newspaper, reported that the Danish parliament had passed a new law requiring all dogs to be painted white. The purpose of this, it explained, was to increase road safety by allowing dogs to be seen more easily at night. [Appleton Post-Crescent
, Apr 1, 1965.]