The inventor, Dan Zethraeus, reportedly confirmed that the crude device is, in fact, part of an experiment to develop a new way to power electric cars directly from the road. He didn't give any other details on the device, citing his lack of a patent for the technology.
The scare happened when Zethraeus was on vacation in the Danish capital – he had decided to travel without removing the suspicious equipment. In the future, he says, he will remove the equipment before embarking on road trips. Sounds like a pretty good idea, no?