"We saw two orange dots rise into the sky and disappear", he shared.
But extraterrestrials weren't behind the demonstration.
Painting the sky with your own aurora is as easy as launching a NASA rocket into the Norwegian night.
Later, however, the police effectively put all conspiracy theorists to shame by explaining that the light display was in fact a science rocket launch from the Andøya Space Center in northern Norway.
NASA and USA scientists are joining those from Norway, Japan, Canada and other countries to investigate the physics of heating and charged particle precipitation in this region called the geomagnetic cusp - one of the few places on Earth with easy access to the electrically charged solar wind that pervades the solar system. A recent test of NASA's Auroral Zone Upwelling Rocket Experiment (AZURE for short) created a brilliant and colorful could display in the skies above Norway, catching the eyes of locals who had absolutely no idea what they were looking at.
AZURE is the first of eight sounding rocket missions launching over the next two years as part of an global collaboration of scientists known as The Grand Challenge Initiative - Cusp.
These mixtures, using substances similar to those found in fireworks, created colorful clouds that allow the researchers to track the flow of neutral and charged particles with the auroral wind. These lofty detectives should assist the American space agency in measuring the violent vertical winds that blend electrically charged particles and energy through the atmosphere, thereby discovering the winds' density and temperature. Theusner, writing in a description of the time-lapse on YouTube, said he "coincidentally" captured images of the rockets and of their subsequent light show.
According to a statement from NASA, the AZURE is just the first of eight rocket missions set to study the interactions of Earth's magnetic fields and particles from space that bombard the planet.
The blue lights triggered rumours about aliens, UFOs, with some even claiming that the pictures are fake- having been "edited" or 'photoshopped'.