single flashing light, suddenly hundreds or thousands of flashes, then back to one singleIt was in the end of winter 1991/-92. My mother, my little sister and me where driving the E6 from Harstad to Fauske (two towns in nithern Norway). When we exited the Kannflog-tunnel, declining down to Sommerset, in Leirfjord, I noticed a flashing light in the sky. It was a cloudy night and no stars where visible, so this light It was a single bright flashing light (minimum 10 flash/sec(can't judge my mind to separate more)) flying on a straight course about west-norhwest (left to right in our wiew).It's hard to estimate things like speed, altitude and size on an unidentified object in the night-sky, but I guess the altitude was about 600 meters above the fjord. Since the surrounding mountains are 3-500m with peeks up to about 1300m. I remember the clouds to be about 800-1000m above the sea. We kept a speed of 80km/h or 50 miles, so we also got kind of a 3D-perspective of the course.If my altitude-estimation is about correct, this object where flying way too slow to use conventional aerodynamical wings. My first thought was a helicopter, but the flashes where on a much higher frequency, and appered much brighter than I have ever seen on a conventional aircraft. (and I've worked as airport-groundpersonell for two years!) And out of nowhere. When the object was about the middle of the fjord, hundreds or maybe thousands of flashes, in an area of at least 200 meters in diameter (if all my estimates are somewhere close to accurate) kept on fireing for about 2 - 3 seconds(nothing systematical or symmetrical about them) And then it was just that single flashing light on the same low-speed steady-corse crossing the fjord and finally dissappearing behind the mountain towards Sagfjord.If you are interrested, I can mail you a map of the area and draw things like the objects course, our possition(s)((NUFORC Note: Source of report indicates that the date of the incident is approximate. PD))