That one is the wickedlasers.com one.. very nice laser, but very dangerous because of the wavelength.. It emits within visible and part invisible
ultraviolet which damages the eye instantly and permanently if you get scattered, reflected or direct light from it... I haven't yet recieved mine
either....
I would have to say, best educated guess, is if it wsn't someone playing with a laser, then it was a military test.
Remember, they test these things - aircraft, marine vessels, comm & weapon systems - for many, many years before revealing them to the public.
They're happy to let people scratch their heads, wondering what they saw, rather then tell everyone what's going on.