Further to the "UFO incident of the K-5", UFOs also appeared for the K-r, see this!
(URL: http://www.youtube.com/watch?v=bm4njpkaz3k)
Btw, the mood of this Japanese CM (Commercial Movie, aka TV Ad in Western term) is in line with the K-5 UFO incident. Well, it's just mysterious afterall and what a mystery it is! ;-D